diff --git a/CHANGELOG.md b/CHANGELOG.md
index dd69677..ebf840f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+### Changed
+- update dependencies, including stable tokio this time.
 
 ## [v0.3.0] - 2021-04-19
 ### Added
diff --git a/Cargo.lock b/Cargo.lock
index 1445e71..1e4cf91 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,27 +1,12 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
-[[package]]
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-version = "0.14.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a55f82cfe485775d02112886f4169bde0c5894d75e79ead7eafe7e40a25e45f7"
-dependencies = [
- "gimli",
-]
-
-[[package]]
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-version = "1.0.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f26201604c87b1e01bd3d98f8d5d9a8fcbb815e8cedb41ffccbeb4bf593a35fe"
-
 [[package]]
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 checksum = "ee49baf6cb617b853aa8d93bf420db2383fab46d314482ca2803b40d5fde979b"
 dependencies = [
- "winapi 0.3.9",
+ "winapi",
 ]
 
 [[package]]
@@ -32,7 +17,7 @@ checksum = "d9b39be18770d11421cdb1b9947a45dd3f37e93092cbf377614828a319d5fee8"
 dependencies = [
  "hermit-abi",
  "libc",
- "winapi 0.3.9",
+ "winapi",
 ]
 
 [[package]]
@@ -41,44 +26,18 @@ version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
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-dependencies = [
- "addr2line",
- "cfg-if 1.0.0",
- "libc",
- "miniz_oxide",
- "object",
- "rustc-demangle",
-]
-
 [[package]]
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-[[package]]
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-source = "registry+https://github.com/rust-lang/crates.io-index"
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-
 [[package]]
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-checksum = "4785bdd1c96b2a846b2bd7cc02e86b6b3dbf14e7e53446c4f54c92a361040822"
-
 [[package]]
 name = "cfg-if"
 version = "1.0.0"
@@ -95,7 +54,7 @@ dependencies = [
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  "num-traits",
  "time",
- "winapi 0.3.9",
+ "winapi",
 ]
 
 [[package]]
@@ -113,28 +72,6 @@ dependencies = [
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 ]
 
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-name = "failure"
-version = "0.1.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d32e9bd16cc02eae7db7ef620b392808b89f6a5e16bb3497d159c6b92a0f4f86"
-dependencies = [
- "backtrace",
- "failure_derive",
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-
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-dependencies = [
- "proc-macro2",
- "quote",
- "syn",
- "synstructure",
-]
-
 [[package]]
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@@ -150,28 +87,6 @@ version = "1.0.7"
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 checksum = "3f9eec918d3f24069decb9af1554cad7c880e2da24a9afd88aca000531ab82c1"
 
-[[package]]
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-version = "0.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a06f77d526c1a601b7c4cdd98f54b5eaabffc14d5f2f0296febdc7f357c6d3ba"
-
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-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2e9763c69ebaae630ba35f74888db465e49e259ba1bc0eda7d06f4a067615d82"
-dependencies = [
- "bitflags",
- "fuchsia-zircon-sys",
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-
-[[package]]
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-
 [[package]]
 name = "futures"
 version = "0.3.14"
@@ -257,7 +172,7 @@ dependencies = [
  "futures-sink",
  "futures-task",
  "memchr",
- "pin-project-lite 0.2.6",
+ "pin-project-lite",
  "pin-utils",
  "proc-macro-hack",
  "proc-macro-nested",
@@ -265,18 +180,23 @@ dependencies = [
 ]
 
 [[package]]
-name = "gimli"
-version = "0.23.0"
+name = "getrandom"
+version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f6503fe142514ca4799d4c26297c4248239fe8838d827db6bd6065c6ed29a6ce"
+checksum = "c9495705279e7140bf035dde1f6e750c162df8b625267cd52cc44e0b156732c8"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "wasi",
+]
 
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-version = "0.2.7"
+version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5e4728fd124914ad25e99e3d15a9361a879f6620f63cb56bbb08f95abb97a535"
+checksum = "fc018e188373e2777d0ef2467ebff62a08e66c3f5857b23c8fbec3018210dc00"
 dependencies = [
- "bytes 0.5.6",
+ "bytes",
  "fnv",
  "futures-core",
  "futures-sink",
@@ -287,7 +207,6 @@ dependencies = [
  "tokio",
  "tokio-util",
  "tracing",
- "tracing-futures",
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@@ -311,19 +230,20 @@ version = "0.2.4"
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 checksum = "527e8c9ac747e28542699a951517aa9a6945af506cd1f2e1b53a576c17b6cc11"
 dependencies = [
- "bytes 1.0.1",
+ "bytes",
  "fnv",
  "itoa",
 ]
 
 [[package]]
 name = "http-body"
-version = "0.3.1"
+version = "0.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
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+checksum = "5dfb77c123b4e2f72a2069aeae0b4b4949cc7e966df277813fc16347e7549737"
 dependencies = [
- "bytes 0.5.6",
+ "bytes",
  "http",
+ "pin-project-lite",
 ]
 
 [[package]]
@@ -334,17 +254,17 @@ checksum = "4a1ce40d6fc9764887c2fdc7305c3dcc429ba11ff981c1509416afd5697e4437"
 
 [[package]]
 name = "httpdate"
-version = "0.3.2"
+version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "494b4d60369511e7dea41cf646832512a94e542f68bb9c49e54518e0f468eb47"
+checksum = "05842d0d43232b23ccb7060ecb0f0626922c21f30012e97b767b30afd4a5d4b9"
 
 [[package]]
 name = "hyper"
-version = "0.13.10"
+version = "0.14.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8a6f157065790a3ed2f88679250419b5cdd96e714a0d65f7797fd337186e96bb"
+checksum = "1e5f105c494081baa3bf9e200b279e27ec1623895cd504c7dbef8d0b080fcf54"
 dependencies = [
- "bytes 0.5.6",
+ "bytes",
  "futures-channel",
  "futures-core",
  "futures-util",
@@ -373,12 +293,12 @@ dependencies = [
 ]
 
 [[package]]
-name = "iovec"
-version = "0.1.4"
+name = "instant"
+version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b2b3ea6ff95e175473f8ffe6a7eb7c00d054240321b84c57051175fe3c1e075e"
+checksum = "61124eeebbd69b8190558df225adf7e4caafce0d743919e5d6b19652314ec5ec"
 dependencies = [
- "libc",
+ "cfg-if",
 ]
 
 [[package]]
@@ -387,16 +307,6 @@ version = "0.4.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "dd25036021b0de88a0aff6b850051563c6516d0bf53f8638938edbb9de732736"
 
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-dependencies = [
- "winapi 0.2.8",
- "winapi-build",
-]
-
 [[package]]
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@@ -409,77 +319,59 @@ version = "0.2.93"
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 checksum = "9385f66bf6105b241aa65a61cb923ef20efc665cb9f9bb50ac2f0c4b7f378d41"
 
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+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5a3c91c24eae6777794bb1997ad98bbb87daf92890acab859f7eaa4320333176"
+dependencies = [
+ "scopeguard",
+]
+
 [[package]]
 name = "log"
 version = "0.4.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "51b9bbe6c47d51fc3e1a9b945965946b4c44142ab8792c50835a980d362c2710"
 dependencies = [
- "cfg-if 1.0.0",
+ "cfg-if",
 ]
 
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-version = "2.0.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "60302e4db3a61da70c0cb7991976248362f30319e88850c487b9b95bbf059e00"
-
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- "iovec",
- "kernel32-sys",
  "libc",
  "log",
  "miow",
- "net2",
- "slab",
- "winapi 0.2.8",
+ "ntapi",
+ "winapi",
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-version = "0.2.2"
+version = "0.3.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
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 dependencies = [
- "kernel32-sys",
- "net2",
- "winapi 0.2.8",
- "ws2_32-sys",
+ "winapi",
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-version = "0.2.37"
+name = "ntapi"
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 dependencies = [
- "cfg-if 0.1.10",
- "libc",
- "winapi 0.3.9",
+ "winapi",
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 [[package]]
@@ -511,41 +403,29 @@ dependencies = [
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 ]
 
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-]
-
 [[package]]
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 source = "registry+https://github.com/rust-lang/crates.io-index"
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+checksum = "6d7744ac029df22dca6284efe4e898991d28e3085c706c972bcd7da4a27a15eb"
 dependencies = [
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+ "instant",
+ "lock_api",
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-version = "0.2.14"
+version = "0.8.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4db1a8ccf734a7bce794cc19b3df06ed87ab2f3907036b693c68f56b4d4537fa"
+checksum = "fa7a782938e745763fe6907fc6ba86946d72f49fe7e21de074e08128a99fb018"
 dependencies = [
+ "cfg-if",
+ "instant",
  "libc",
- "rand",
+ "redox_syscall",
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- "winapi 0.3.9",
+ "winapi",
 ]
 
 [[package]]
@@ -587,12 +467,6 @@ dependencies = [
  "syn",
 ]
 
-[[package]]
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-source = "registry+https://github.com/rust-lang/crates.io-index"
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-
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@@ -605,6 +479,12 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8b870d8c151b6f2fb93e84a13146138f05d02ed11c7e7c54f8826aaaf7c9f184"
 
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac74c624d6b2d21f425f752262f42188365d7b8ff1aff74c82e45136510a4857"
+
 [[package]]
 name = "proc-macro-hack"
 version = "0.5.19"
@@ -628,15 +508,16 @@ dependencies = [
 
 [[package]]
 name = "prometheus"
-version = "0.8.0"
+version = "0.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b0575e258dab62268e7236d7307caa38848acbda7ec7ab87bd9093791e999d20"
+checksum = "5986aa8d62380092d2f50f8b1cdba9cb9b6731ffd4b25b51fd126b6c3e05b99c"
 dependencies = [
- "cfg-if 0.1.10",
+ "cfg-if",
  "fnv",
  "lazy_static",
+ "memchr",
+ "parking_lot",
  "protobuf",
- "spin",
  "thiserror",
 ]
 
@@ -657,46 +538,58 @@ dependencies = [
 
 [[package]]
 name = "rand"
-version = "0.4.6"
+version = "0.8.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "552840b97013b1a26992c11eac34bdd778e464601a4c2054b5f0bff7c6761293"
+checksum = "0ef9e7e66b4468674bfcb0c81af8b7fa0bb154fa9f28eb840da5c447baeb8d7e"
 dependencies = [
- "fuchsia-cprng",
  "libc",
- "rand_core 0.3.1",
- "rdrand",
- "winapi 0.3.9",
+ "rand_chacha",
+ "rand_core",
+ "rand_hc",
+]
+
+[[package]]
+name = "rand_chacha"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e12735cf05c9e10bf21534da50a147b924d555dc7a547c42e6bb2d5b6017ae0d"
+dependencies = [
+ "ppv-lite86",
+ "rand_core",
 ]
 
 [[package]]
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-version = "0.3.1"
+version = "0.6.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7a6fdeb83b075e8266dcc8762c22776f6877a63111121f5f8c7411e5be7eed4b"
+checksum = "34cf66eb183df1c5876e2dcf6b13d57340741e8dc255b48e40a26de954d06ae7"
 dependencies = [
- "rand_core 0.4.2",
+ "getrandom",
 ]
 
 [[package]]
-name = "rand_core"
-version = "0.4.2"
+name = "rand_hc"
+version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9c33a3c44ca05fa6f1807d8e6743f3824e8509beca625669633be0acbdf509dc"
-
-[[package]]
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-version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "678054eb77286b51581ba43620cc911abf02758c91f93f479767aed0f90458b2"
+checksum = "3190ef7066a446f2e7f42e239d161e905420ccab01eb967c9eb27d21b2322a73"
 dependencies = [
- "rand_core 0.3.1",
+ "rand_core",
 ]
 
 [[package]]
-name = "rustc-demangle"
-version = "0.1.18"
+name = "redox_syscall"
+version = "0.2.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6e3bad0ee36814ca07d7968269dd4b7ec89ec2da10c4bb613928d3077083c232"
+checksum = "8270314b5ccceb518e7e578952f0b72b88222d02e8f77f5ecf7abbb673539041"
+dependencies = [
+ "bitflags",
+]
+
+[[package]]
+name = "scopeguard"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d29ab0c6d3fc0ee92fe66e2d99f700eab17a8d57d1c1d3b748380fb20baa78cd"
 
 [[package]]
 name = "serde"
@@ -720,42 +613,26 @@ dependencies = [
 
 [[package]]
 name = "slab"
-version = "0.4.2"
+version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c111b5bd5695e56cffe5129854aa230b39c93a305372fdbb2668ca2394eea9f8"
+checksum = "f173ac3d1a7e3b28003f40de0b5ce7fe2710f9b9dc3fc38664cebee46b3b6527"
 
 [[package]]
 name = "smallvec"
-version = "0.6.14"
+version = "1.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b97fcaeba89edba30f044a10c6a3cc39df9c3f17d7cd829dd1446cab35f890e0"
-dependencies = [
- "maybe-uninit",
-]
+checksum = "fe0f37c9e8f3c5a4a66ad655a93c74daac4ad00c441533bf5c6e7990bb42604e"
 
 [[package]]
 name = "socket2"
-version = "0.3.19"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "122e570113d28d773067fab24266b66753f6ea915758651696b6e35e49f88d6e"
+checksum = "9e3dfc207c526015c632472a77be09cf1b6e46866581aecae5cc38fb4235dea2"
 dependencies = [
- "cfg-if 1.0.0",
  "libc",
- "winapi 0.3.9",
+ "winapi",
 ]
 
-[[package]]
-name = "spin"
-version = "0.5.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6e63cff320ae2c57904679ba7cb63280a3dc4613885beafb148ee7bf9aa9042d"
-
-[[package]]
-name = "stable_deref_trait"
-version = "1.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a8f112729512f8e442d81f95a8a7ddf2b7c6b8a1a6f509a95864142b30cab2d3"
-
 [[package]]
 name = "strsim"
 version = "0.8.0"
@@ -764,27 +641,15 @@ checksum = "8ea5119cdb4c55b55d432abb513a0429384878c15dde60cc77b1c99de1a95a6a"
 
 [[package]]
 name = "syn"
-version = "1.0.69"
+version = "1.0.70"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "48fe99c6bd8b1cc636890bcc071842de909d902c81ac7dab53ba33c421ab8ffb"
+checksum = "b9505f307c872bab8eb46f77ae357c8eba1fdacead58ee5a850116b1d7f82883"
 dependencies = [
  "proc-macro2",
  "quote",
  "unicode-xid",
 ]
 
-[[package]]
-name = "synstructure"
-version = "0.12.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b834f2d66f734cb897113e34aaff2f1ab4719ca946f9a7358dba8f8064148701"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn",
- "unicode-xid",
-]
-
 [[package]]
 name = "textwrap"
 version = "0.11.0"
@@ -822,33 +687,30 @@ checksum = "6db9e6914ab8b1ae1c260a4ae7a49b6c5611b40328a735b21862567685e73255"
 dependencies = [
  "libc",
  "wasi",
- "winapi 0.3.9",
+ "winapi",
 ]
 
 [[package]]
 name = "tokio"
-version = "0.2.25"
+version = "1.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6703a273949a90131b290be1fe7b039d0fc884aa1935860dfcbe056f28cd8092"
+checksum = "83f0c8e7c0addab50b663055baf787d0af7f413a46e6e7fb9559a4e4db7137a5"
 dependencies = [
- "bytes 0.5.6",
- "fnv",
- "futures-core",
- "iovec",
- "lazy_static",
+ "autocfg",
+ "bytes",
+ "libc",
  "memchr",
  "mio",
  "num_cpus",
- "pin-project-lite 0.1.12",
- "slab",
+ "pin-project-lite",
  "tokio-macros",
 ]
 
 [[package]]
 name = "tokio-macros"
-version = "0.2.6"
+version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e44da00bfc73a25f814cd8d7e57a68a5c31b74b3152a0a1d1f590c97ed06265a"
+checksum = "caf7b11a536f46a809a8a9f0bb4237020f70ecbf115b842360afb127ea2fda57"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -858,29 +720,29 @@ dependencies = [
 [[package]]
 name = "tokio-ping"
 version = "0.3.0"
-source = "git+https://github.com/usbalbin/tokio-ping?branch=new_futures#83f6accfb8160f25fcaa30df6c6693339c3d1339"
+source = "git+https://github.com/jcgruenhage/tokio-ping?branch=main#cf9b2de4ceb838b6ac82a28a3c87eaf4a32b8a5a"
 dependencies = [
- "failure",
  "futures",
  "libc",
  "mio",
  "parking_lot",
  "rand",
  "socket2",
+ "thiserror",
  "tokio",
 ]
 
 [[package]]
 name = "tokio-util"
-version = "0.3.1"
+version = "0.6.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "be8242891f2b6cbef26a2d7e8605133c2c554cd35b3e4948ea892d6d68436499"
+checksum = "940a12c99365c31ea8dd9ba04ec1be183ffe4920102bb7122c2f515437601e8e"
 dependencies = [
- "bytes 0.5.6",
+ "bytes",
  "futures-core",
  "futures-sink",
  "log",
- "pin-project-lite 0.1.12",
+ "pin-project-lite",
  "tokio",
 ]
 
@@ -905,9 +767,8 @@ version = "0.1.25"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "01ebdc2bb4498ab1ab5f5b73c5803825e60199229ccba0698170e3be0e7f959f"
 dependencies = [
- "cfg-if 1.0.0",
- "log",
- "pin-project-lite 0.2.6",
+ "cfg-if",
+ "pin-project-lite",
  "tracing-core",
 ]
 
@@ -920,16 +781,6 @@ dependencies = [
  "lazy_static",
 ]
 
-[[package]]
-name = "tracing-futures"
-version = "0.2.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "97d095ae15e245a057c8e8451bab9b3ee1e1f68e9ba2b4fbc18d0ac5237835f2"
-dependencies = [
- "pin-project",
- "tracing",
-]
-
 [[package]]
 name = "try-lock"
 version = "0.2.3"
@@ -970,12 +821,6 @@ version = "0.10.0+wasi-snapshot-preview1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1a143597ca7c7793eff794def352d41792a93c481eb1042423ff7ff72ba2c31f"
 
-[[package]]
-name = "winapi"
-version = "0.2.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "167dc9d6949a9b857f3451275e911c3f44255842c1f7a76f33c55103a909087a"
-
 [[package]]
 name = "winapi"
 version = "0.3.9"
@@ -986,12 +831,6 @@ dependencies = [
  "winapi-x86_64-pc-windows-gnu",
 ]
 
-[[package]]
-name = "winapi-build"
-version = "0.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2d315eee3b34aca4797b2da6b13ed88266e6d612562a0c46390af8299fc699bc"
-
 [[package]]
 name = "winapi-i686-pc-windows-gnu"
 version = "0.4.0"
@@ -1003,13 +842,3 @@ name = "winapi-x86_64-pc-windows-gnu"
 version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
-
-[[package]]
-name = "ws2_32-sys"
-version = "0.2.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d59cefebd0c892fa2dd6de581e937301d8552cb44489cdff035c6187cb63fa5e"
-dependencies = [
- "winapi 0.2.8",
- "winapi-build",
-]
diff --git a/Cargo.toml b/Cargo.toml
index 2b36335..ca31fbb 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,16 +6,16 @@ edition = "2018"
 description = "Pings configured hosts in a configurable intervals and exposes metrics for prometheus."
 
 [dependencies]
-prometheus = "0.8.0"
-toml = "0.5.6"
-hyper = "0.13.4"
+prometheus = "0.12.0"
+toml = "0.5.8"
+hyper = { version = "0.14.7", features = ["full"] }
 lazy_static = "1.4.0"
-futures = "0.3.4"
-tokio = { version = "0.2.16", features = ["rt-threaded", "macros", "time"] }
-clap = "2.33.0"
+futures = "0.3.14"
+tokio = { version = "1.5.0", features = ["rt-multi-thread", "macros", "time"] }
+clap = "2.33.3"
 fern = "0.6.0"
-log = "0.4.8"
-chrono = "0.4.11"
-serde = { version = "1.0.106", features = ["derive"] }
-tokio-ping = { git = "https://github.com/usbalbin/tokio-ping", branch = "new_futures" }
-futures-util = "0.3.4"
+log = "0.4.14"
+chrono = "0.4.19"
+serde = { version = "1.0.125", features = ["derive"] }
+tokio-ping = { git = "https://github.com/jcgruenhage/tokio-ping", branch = "main" }
+futures-util = "0.3.14"
diff --git a/src/metrics.rs b/src/metrics.rs
index c9c7561..85a5491 100644
--- a/src/metrics.rs
+++ b/src/metrics.rs
@@ -20,8 +20,9 @@
 use crate::config::Config;
 use hyper::{
     header::CONTENT_TYPE,
+    server::Server,
     service::{make_service_fn, service_fn},
-    Body, Request, Response, Server,
+    Body, Request, Response,
 };
 use lazy_static::lazy_static;
 use log::info;