diff --git a/pkgs/servers/monitoring/sensu/Gemfile.lock b/pkgs/servers/monitoring/sensu/Gemfile.lock
index 9f58be03b621..ee425b6edf97 100644
--- a/pkgs/servers/monitoring/sensu/Gemfile.lock
+++ b/pkgs/servers/monitoring/sensu/Gemfile.lock
@@ -1,75 +1,79 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    amq-protocol (1.9.2)
-    amqp (1.5.0)
-      amq-protocol (>= 1.9.2)
+    amq-protocol (2.0.1)
+    amqp (1.6.0)
+      amq-protocol (>= 2.0.1)
       eventmachine
-    async_sinatra (1.0.0)
-      rack (>= 1.4.1)
-      sinatra (>= 1.3.2)
-    childprocess (0.5.3)
+    childprocess (0.5.8)
       ffi (~> 1.0, >= 1.0.11)
-    daemons (1.2.2)
-    em-redis-unified (0.6.0)
-      eventmachine (>= 0.12.10)
+    em-http-server (0.1.8)
+      eventmachine
     em-worker (0.0.2)
       eventmachine
-    eventmachine (1.0.3)
-    ffi (1.9.8)
-    multi_json (1.11.0)
-    rack (1.6.0)
-    rack-protection (1.5.3)
-      rack
-    sensu (0.17.1)
-      async_sinatra (= 1.0.0)
-      em-redis-unified (= 0.6.0)
-      eventmachine (= 1.0.3)
-      multi_json (= 1.11.0)
-      sensu-em (= 2.4.1)
-      sensu-extension (= 1.1.2)
-      sensu-extensions (= 1.2.0)
-      sensu-logger (= 1.0.0)
-      sensu-settings (= 1.3.0)
-      sensu-spawn (= 1.1.0)
-      sensu-transport (= 2.4.0)
-      sinatra (= 1.3.5)
-      thin (= 1.5.0)
-      uuidtools (= 2.1.4)
-    sensu-em (2.4.1)
-    sensu-extension (1.1.2)
-      sensu-em
-    sensu-extensions (1.2.0)
-      multi_json
-      sensu-em
+    eventmachine (1.2.2)
+    ffi (1.9.17)
+    oj (2.14.6)
+    parse-cron (0.1.4)
+    sensu (0.28.0)
+      em-http-server (= 0.1.8)
+      eventmachine (= 1.2.2)
+      parse-cron (= 0.1.4)
+      sensu-extension (= 1.5.1)
+      sensu-extensions (= 1.7.1)
+      sensu-json (= 2.0.1)
+      sensu-logger (= 1.2.1)
+      sensu-redis (= 2.1.0)
+      sensu-settings (= 9.9.0)
+      sensu-spawn (= 2.2.1)
+      sensu-transport (= 7.0.2)
+    sensu-extension (1.5.1)
+      eventmachine
+    sensu-extensions (1.7.1)
       sensu-extension
+      sensu-extensions-debug (= 1.0.0)
+      sensu-extensions-json (= 1.0.0)
+      sensu-extensions-occurrences (= 1.1.0)
+      sensu-extensions-only-check-output (= 1.0.0)
+      sensu-extensions-ruby-hash (= 1.0.0)
+      sensu-json (>= 1.1.0)
       sensu-logger
       sensu-settings
-    sensu-logger (1.0.0)
-      multi_json
-      sensu-em
-    sensu-settings (1.3.0)
-      multi_json
-    sensu-spawn (1.1.0)
-      childprocess (= 0.5.3)
+    sensu-extensions-debug (1.0.0)
+      sensu-extension
+    sensu-extensions-json (1.0.0)
+      sensu-extension
+    sensu-extensions-occurrences (1.1.0)
+      sensu-extension
+    sensu-extensions-only-check-output (1.0.0)
+      sensu-extension
+    sensu-extensions-ruby-hash (1.0.0)
+      sensu-extension
+    sensu-json (2.0.1)
+      oj (= 2.14.6)
+    sensu-logger (1.2.1)
+      eventmachine
+      sensu-json
+    sensu-redis (2.1.0)
+      eventmachine
+    sensu-settings (9.9.0)
+      parse-cron
+      sensu-json (>= 1.1.0)
+    sensu-spawn (2.2.1)
+      childprocess (= 0.5.8)
       em-worker (= 0.0.2)
-      sensu-em
-    sensu-transport (2.4.0)
-      amqp (= 1.5.0)
-      sensu-em
-    sinatra (1.3.5)
-      rack (~> 1.4)
-      rack-protection (~> 1.3)
-      tilt (~> 1.3, >= 1.3.3)
-    thin (1.5.0)
-      daemons (>= 1.0.9)
-      eventmachine (>= 0.12.6)
-      rack (>= 1.0.0)
-    tilt (1.4.1)
-    uuidtools (2.1.4)
+      eventmachine
+    sensu-transport (7.0.2)
+      amq-protocol (= 2.0.1)
+      amqp (= 1.6.0)
+      eventmachine
+      sensu-redis (>= 1.0.0)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
   sensu
+
+BUNDLED WITH
+   1.14.4
diff --git a/pkgs/servers/monitoring/sensu/default.nix b/pkgs/servers/monitoring/sensu/default.nix
index ecc1d4109843..c0a2c3ca49e5 100644
--- a/pkgs/servers/monitoring/sensu/default.nix
+++ b/pkgs/servers/monitoring/sensu/default.nix
@@ -1,16 +1,17 @@
-  { lib, bundlerEnv, ruby }:
+{ lib, bundlerEnv, ruby }:
 
-  bundlerEnv {
-    name = "sensu-0.17.1";
+bundlerEnv rec {
+  name = "sensu-${version}";
+  version = (import ./gemset.nix).sensu.version;
 
-    inherit ruby;
-    gemdir = ./.;
+  inherit ruby;
+  gemdir = ./.;
 
-    meta = with lib; {
-      description = "A monitoring framework that aims to be simple, malleable, and scalable";
-      homepage    = http://sensuapp.org/;
-      license     = licenses.mit;
-      maintainers = with maintainers; [ theuni ];
-      platforms   = platforms.unix;
-    };
-  }
+  meta = with lib; {
+    description = "A monitoring framework that aims to be simple, malleable, and scalable";
+    homepage    = http://sensuapp.org/;
+    license     = licenses.mit;
+    maintainers = with maintainers; [ theuni peterhoeg ];
+    platforms   = platforms.unix;
+  };
+}
diff --git a/pkgs/servers/monitoring/sensu/gemset.nix b/pkgs/servers/monitoring/sensu/gemset.nix
index 116bce9c4b53..273496e2fb42 100644
--- a/pkgs/servers/monitoring/sensu/gemset.nix
+++ b/pkgs/servers/monitoring/sensu/gemset.nix
@@ -1,242 +1,186 @@
 {
-  "amq-protocol" = {
-    version = "1.9.2";
+  amq-protocol = {
     source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "1rpn9vgh7y037aqhhp04smihzr73vp5i5g6xlqlha10wy3q0wp7x";
       type = "gem";
-      sha256 = "1gl479j003vixfph5jmdskl20il8816y0flp4msrc8im3b5iiq3r";
     };
+    version = "2.0.1";
   };
-  "amqp" = {
-    version = "1.5.0";
+  amqp = {
     source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "0kbrqnpjgj9v0722p3n5rw589l4g26ry8mcghwc5yr20ggkpdaz9";
       type = "gem";
-      sha256 = "0jlcwyvjz0b28wxdabkyhdqyqp5ji56ckfywsy9mgp0m4wfbrh8c";
     };
-    dependencies = [
-      "amq-protocol"
-      "eventmachine"
-    ];
-  };
-  "async_sinatra" = {
-    version = "1.0.0";
-    source = {
-      type = "gem";
-      sha256 = "02yi9qfsi8kk4a4p1c4sx4pgism05m18kwlc9dd23zzdy9jdgq1a";
-    };
-    dependencies = [
-      "rack"
-      "sinatra"
-    ];
-  };
-  "childprocess" = {
-    version = "0.5.3";
-    source = {
-      type = "gem";
-      sha256 = "12djpdr487fddq55sav8gw1pjglcbb0ab0s6npga0ywgsqdyvsww";
-    };
-    dependencies = [
-      "ffi"
-    ];
-  };
-  "daemons" = {
-    version = "1.2.2";
-    source = {
-      type = "gem";
-      sha256 = "121c7vkimg3baxga69xvdkwxiq8wkmxqvdbyqi5i82vhih5d3cn3";
-    };
-  };
-  "em-redis-unified" = {
-    version = "0.6.0";
-    source = {
-      type = "gem";
-      sha256 = "1hf7dv6qmxfilpd7crcqlyqk6jp5z8md76bpg3n0163ps4ra73p0";
-    };
-    dependencies = [
-      "eventmachine"
-    ];
-  };
-  "em-worker" = {
-    version = "0.0.2";
-    source = {
-      type = "gem";
-      sha256 = "0z4jx9z2q5hxvdvik4yp0ahwfk69qsmdnyp72ln22p3qlkq2z5wk";
-    };
-    dependencies = [
-      "eventmachine"
-    ];
-  };
-  "eventmachine" = {
-    version = "1.0.3";
-    source = {
-      type = "gem";
-      sha256 = "09sqlsb6x9ddlgfw5gsw7z0yjg5m2qfjiqkz2fx70zsizj3lqhil";
-    };
-  };
-  "ffi" = {
-    version = "1.9.8";
-    source = {
-      type = "gem";
-      sha256 = "0ph098bv92rn5wl6rn2hwb4ng24v4187sz8pa0bpi9jfh50im879";
-    };
-  };
-  "multi_json" = {
-    version = "1.11.0";
-    source = {
-      type = "gem";
-      sha256 = "1mg3hp17ch8bkf3ndj40s50yjs0vrqbfh3aq5r02jkpjkh23wgxl";
-    };
-  };
-  "rack" = {
     version = "1.6.0";
-    source = {
-      type = "gem";
-      sha256 = "1f57f8xmrgfgd76s6mq7vx6i266zm4330igw71an1g0kh3a42sbb";
-    };
   };
-  "rack-protection" = {
-    version = "1.5.3";
+  childprocess = {
     source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "1lv7axi1fhascm9njxh3lx1rbrnsm8wgvib0g7j26v4h1fcphqg0";
       type = "gem";
-      sha256 = "0cvb21zz7p9wy23wdav63z5qzfn4nialik22yqp6gihkgfqqrh5r";
     };
-    dependencies = [
-      "rack"
-    ];
+    version = "0.5.8";
   };
-  "sensu" = {
-    version = "0.17.1";
+  em-http-server = {
     source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "0y8l4gymy9dzjjchjav90ck6has2i2zdjihlhcyrg3jgq6kjzyq5";
       type = "gem";
-      sha256 = "1fqpypins1zhind0in0ax0y97a6pf3z85gwjz4bjm6cjrkarb5zj";
     };
-    dependencies = [
-      "async_sinatra"
-      "em-redis-unified"
-      "eventmachine"
-      "multi_json"
-      "sensu-em"
-      "sensu-extension"
-      "sensu-extensions"
-      "sensu-logger"
-      "sensu-settings"
-      "sensu-spawn"
-      "sensu-transport"
-      "sinatra"
-      "thin"
-      "uuidtools"
-    ];
+    version = "0.1.8";
   };
-  "sensu-em" = {
-    version = "2.4.1";
+  em-worker = {
+    dependencies = ["eventmachine"];
     source = {
+      sha256 = "0z4jx9z2q5hxvdvik4yp0ahwfk69qsmdnyp72ln22p3qlkq2z5wk";
       type = "gem";
-      sha256 = "08jz47lfnv55c9yl2dhyv1si6zl8h4xj8y1sjy2h2fqy48prfgmy";
     };
+    version = "0.0.2";
   };
-  "sensu-extension" = {
-    version = "1.1.2";
+  eventmachine = {
     source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "00mlcq33q104spkb5c997lwallpilhj0d6fzsbd4lr9s8lmjga5f";
       type = "gem";
-      sha256 = "19qz22fcb3xjz9p5npghlcvxkf8h1rsfws3j988ybnimmmmiqm24";
     };
-    dependencies = [
-      "sensu-em"
-    ];
+    version = "1.2.2";
   };
-  "sensu-extensions" = {
-    version = "1.2.0";
+  ffi = {
     source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "07hnyr47mndsjfanzh348wm3fxjx9nx68mdb3cpsdvfqrxnz97s7";
       type = "gem";
-      sha256 = "1b8978g1ww7vdrsw7zvba6qvc56s4vfm1hw3szw3j1gsk6j0vb81";
     };
-    dependencies = [
-      "multi_json"
-      "sensu-em"
-      "sensu-extension"
-      "sensu-logger"
-      "sensu-settings"
-    ];
+    version = "1.9.17";
   };
-  "sensu-logger" = {
+  oj = {
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "0pa9vmbxivplphad4ddjy30ylbb3bi61y13vmwx4llz3svl8r8kk";
+      type = "gem";
+    };
+    version = "2.14.6";
+  };
+  parse-cron = {
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "02fj9i21brm88nb91ikxwxbwv9y7mb7jsz6yydh82rifwq7357hg";
+      type = "gem";
+    };
+    version = "0.1.4";
+  };
+  sensu = {
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "1dbyc1wylg9ligr1slv60myhbzdbja96v3srb3xrirv6vl33npqx";
+      type = "gem";
+    };
+    version = "0.28.0";
+  };
+  sensu-extension = {
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "1lgmjxfbq11v4yi3qanf1qxv0sgm1a8a7wj7qyn1nkva6zmimss3";
+      type = "gem";
+    };
+    version = "1.5.1";
+  };
+  sensu-extensions = {
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "0axjqak7yhhznhs9f4q8km7ikha5khglwqsc33scck13hsvw9l6g";
+      type = "gem";
+    };
+    version = "1.7.1";
+  };
+  sensu-extensions-debug = {
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "11abdgn2kkkbvxq4692yg6a27qnxz4349gfiq7d35biy7vrw34lp";
+      type = "gem";
+    };
     version = "1.0.0";
-    source = {
-      type = "gem";
-      sha256 = "0vwa2b5wa9xqzb9lmhma49171iabwbnnnyhhhaii8n6j4axvar93";
-    };
-    dependencies = [
-      "multi_json"
-      "sensu-em"
-    ];
   };
-  "sensu-settings" = {
-    version = "1.3.0";
+  sensu-extensions-json = {
     source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "1wnbn9sycdqdh9m0fhszaqkv0jijs3fkdbvcv8kdspx6irbv3m6g";
       type = "gem";
-      sha256 = "0s9fyqhq5vf9m9937n3wczlr4z62rn1ydc6m53vn4156fpim6yga";
     };
-    dependencies = [
-      "multi_json"
-    ];
+    version = "1.0.0";
   };
-  "sensu-spawn" = {
+  sensu-extensions-occurrences = {
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "0xi9888gp3lz5fik1k32bc1c6sjp7rr551p8dr5i3hsm5ii7blja";
+      type = "gem";
+    };
     version = "1.1.0";
-    source = {
-      type = "gem";
-      sha256 = "0w9z6hpr27lq02y6c2mnrdl9xpsjfg77kzsfsp2f2w4swdwmiv0v";
-    };
-    dependencies = [
-      "childprocess"
-      "em-worker"
-      "sensu-em"
-    ];
   };
-  "sensu-transport" = {
-    version = "2.4.0";
+  sensu-extensions-only-check-output = {
     source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "0ds2i8wd4ji9ifig2zzr4jpxinvk5dm7j10pvaqy4snykxa3rqh3";
       type = "gem";
-      sha256 = "0gh8rcl22daax7qng93kj2jydql1jhhskd37kj7sgz0rr8wy2x06";
     };
-    dependencies = [
-      "amqp"
-      "sensu-em"
-    ];
+    version = "1.0.0";
   };
-  "sinatra" = {
-    version = "1.3.5";
+  sensu-extensions-ruby-hash = {
     source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "1xyrj3gbmslbivcd5qcmyclgapn7qf7f5jwfvfpw53bxzib0h7s3";
       type = "gem";
-      sha256 = "1mn6nzfyirfqr7prhsn4nr3k481c6nzsad2p9s1xnsbvxa1vkqwr";
     };
-    dependencies = [
-      "rack"
-      "rack-protection"
-      "tilt"
-    ];
+    version = "1.0.0";
   };
-  "thin" = {
-    version = "1.5.0";
+  sensu-json = {
     source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "08bn8a5fscbhc9mcjg5avwjjbwxn28b48336bdxx87yng0wyafm4";
       type = "gem";
-      sha256 = "14sd2qbbk6y108z6v723mh3f1mk8s4fwxmmn9f8dk4xkhk4rwvq1";
     };
-    dependencies = [
-      "daemons"
-      "eventmachine"
-      "rack"
-    ];
+    version = "2.0.1";
   };
-  "tilt" = {
-    version = "1.4.1";
+  sensu-logger = {
     source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "03kicjqz8a594bxnwyg6bcd4fipy2vxjl1gbaip4gpixxki32dx0";
       type = "gem";
-      sha256 = "00sr3yy7sbqaq7cb2d2kpycajxqf1b1wr1yy33z4bnzmqii0b0ir";
     };
+    version = "1.2.1";
   };
-  "uuidtools" = {
-    version = "2.1.4";
+  sensu-redis = {
     source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "10axrjg2q569bjdchpjsdillzszifkgkayaz390hnf876mssqwcg";
       type = "gem";
-      sha256 = "1w0bhnkp5515f3yx5fakfrfkawxjpb4fjm1r2c6lk691xlr696s3";
     };
+    version = "2.1.0";
+  };
+  sensu-settings = {
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "0bs66zmhs7yrwywvfhbld051d83f3nypmk2rf8dfn19ijzk4ch9i";
+      type = "gem";
+    };
+    version = "9.9.0";
+  };
+  sensu-spawn = {
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "1vz5kbqk3ld0s16zjl8m38l1m1xwcvjlfc1g4nfm45qxdyfn7la7";
+      type = "gem";
+    };
+    version = "2.2.1";
+  };
+  sensu-transport = {
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "15yib92hwyd8v04wcc0kaw0p8w2c2mwvi4ldya2jh3dqgs31mvhr";
+      type = "gem";
+    };
+    version = "7.0.2";
   };
 }
\ No newline at end of file