diff --git a/pkgs/development/tools/misc/kibana/6.x.nix b/pkgs/development/tools/misc/kibana/6.x.nix
index b7e9dd0aaef4..e11dd5040b09 100644
--- a/pkgs/development/tools/misc/kibana/6.x.nix
+++ b/pkgs/development/tools/misc/kibana/6.x.nix
@@ -19,12 +19,12 @@ let
   shas =
     if enableUnfree
     then {
-      "x86_64-linux"  = "039ll00kvrp881cyybb04z90cw68j7p5cspgdxh0bky9lyi9qpwb";
-      "x86_64-darwin" = "0qrakrihcjwn9dic77b0k9ja3zf6nbz534v76xid9gv20md5dds3";
+      "x86_64-linux"  = "1i3zmzxihplwd8n994lfxhhgygdg3qxjqgrj1difa8w3vss0zbfn";
+      "x86_64-darwin" = "09a96ms9id77infxd9xxfs6r7j01mn0rz5yw3g9sl92j9ri7r52c";
     }
     else {
-      "x86_64-linux"  = "1v1fbmfkbnlx043z3yx02gaqqy63bj2ymvcby66n4qq0vlpahvwx";
-      "x86_64-darwin" = "1y4q7a2b9arln94d6sj547qkv3258jlgcz9b342fh6khlbpfjb8c";
+      "x86_64-linux"  = "166rhxr0qlv1yarj2mg1c3b8mxvhl70jhz53azq7ic6laj55q7fk";
+      "x86_64-darwin" = "0ngngkbl036p2mzwhp8qafi3aqzk398a218w12srfqny5n630vdk";
     };
 
 in stdenv.mkDerivation rec {
diff --git a/pkgs/misc/logging/beats/6.x.nix b/pkgs/misc/logging/beats/6.x.nix
index 5351b253eedc..2f7e38692eb1 100644
--- a/pkgs/misc/logging/beats/6.x.nix
+++ b/pkgs/misc/logging/beats/6.x.nix
@@ -8,7 +8,7 @@ let beat = package : extraArgs : buildGoPackage (rec {
         owner = "elastic";
         repo = "beats";
         rev = "v${version}";
-        sha256 = "0n1sjngc82b7wysw5aaiqvllq4c8rx2jj7khw4vrypc40f8ahjs5";
+        sha256 = "0if08dxibdnqpsxs8f6hvw147j0j8bavhcm11scn28j9id65absq";
       };
 
       goPackagePath = "github.com/elastic/beats";
diff --git a/pkgs/servers/search/elasticsearch/6.x.nix b/pkgs/servers/search/elasticsearch/6.x.nix
index df7324a73f49..73bee6c47f3c 100644
--- a/pkgs/servers/search/elasticsearch/6.x.nix
+++ b/pkgs/servers/search/elasticsearch/6.x.nix
@@ -19,8 +19,8 @@ stdenv.mkDerivation (rec {
     url = "https://artifacts.elastic.co/downloads/elasticsearch/${name}.tar.gz";
     sha256 =
       if enableUnfree
-      then "1qh6iz3qhw8zcvxfss5w3h89zarwvk6dp5bbbag7c30kh94gkqvv"
-      else "13v8qpslanfn5w81qvbg0aqh510yfbl3x59kisvdkz9ifhjbcavi";
+      then "1a88yyl0x4bsx92m3wjsz1fgm76gbfdzcd4bzp2x652rha667vfh"
+      else "04fa0fk25d5yxcjdj0bwqvdrswgwj31fwjvbq4gpg66c6bqwzcn6";
   };
 
   patches = [ ./es-home-6.x.patch ];
diff --git a/pkgs/servers/search/elasticsearch/plugins.nix b/pkgs/servers/search/elasticsearch/plugins.nix
index 0cb1dd5bfc17..2b4c64365ca5 100644
--- a/pkgs/servers/search/elasticsearch/plugins.nix
+++ b/pkgs/servers/search/elasticsearch/plugins.nix
@@ -24,7 +24,7 @@ in {
   elasticsearch_analysis_lemmagen = esPlugin rec {
     name = "elasticsearch-analysis-lemmagen-${version}";
     pluginName = "elasticsearch-analysis-lemmagen";
-    version = "${elk6Version}";
+    version = "6.7.1"; # elk6Version;
     src = fetchurl {
       url = "https://github.com/vhyza/elasticsearch-analysis-lemmagen/releases/download/v${version}/${name}-plugin.zip";
       sha256 = "0mf8lpf40bjpzfj9lkhrg7c3xinzvg7aby3vd6h92g9i676xs8ri";
@@ -33,6 +33,9 @@ in {
       homepage = https://github.com/vhyza/elasticsearch-analysis-lemmagen;
       description = "LemmaGen Analysis plugin provides jLemmaGen lemmatizer as Elasticsearch token filter";
       license = licenses.asl20;
+      # TODO: remove the following when there's a release compatible with elasticsearch-6.7.2.
+      # See: https://github.com/vhyza/elasticsearch-analysis-lemmagen/issues/14
+      broken = true;
     };
   };
 
@@ -42,7 +45,7 @@ in {
     version = "${elk6Version}";
     src = pkgs.fetchurl {
       url = "https://artifacts.elastic.co/downloads/elasticsearch-plugins/discovery-ec2/discovery-ec2-${elk6Version}.zip";
-      sha256 = "05z4vmi29fzfqzid7fdh6h6pjwgd1dz1mhhjgjz9plpvpzymjiln";
+      sha256 = "1p0cdz3lfksfd2kvlcj0syxhbx27mimsaw8q4kgjpjjjwqayg523";
     };
     meta = with stdenv.lib; {
       homepage = https://github.com/elastic/elasticsearch/tree/master/plugins/discovery-ec2;
@@ -54,10 +57,10 @@ in {
   search_guard = esPlugin rec {
     name = "elastic-search-guard-${version}";
     pluginName = "search-guard";
-    version = "${elk6Version}-24.3";
+    version = "${elk6Version}-25.1";
     src = fetchurl rec {
       url = "mirror://maven/com/floragunn/search-guard-6/${version}/search-guard-6-${version}.zip";
-      sha256 = "17gif45fbi4vj9qrzv075fkr7d2sp0naa5bjjj9gvfgqyl2flj7g";
+      sha256 = "119r1zibi0z40mfxrpkx0zzay0yz6c7syqmmw8i2681wmz4nksda";
     };
     meta = with stdenv.lib; {
       homepage = https://github.com/floragunncom/search-guard;
diff --git a/pkgs/tools/misc/logstash/6.x.nix b/pkgs/tools/misc/logstash/6.x.nix
index 359c714228e0..be26aee03b98 100644
--- a/pkgs/tools/misc/logstash/6.x.nix
+++ b/pkgs/tools/misc/logstash/6.x.nix
@@ -16,8 +16,8 @@ stdenv.mkDerivation rec {
     url = "https://artifacts.elastic.co/downloads/logstash/${name}.tar.gz";
     sha256 =
       if enableUnfree
-      then "18j2n6gnhfjmb6skhhrzs0d1zwa1aj9jv37rqvg4w3fimnm8p0sh"
-      else "181x8y6izrh587a6d1qipgj8wk71v4fggypkzjkns4my00nki42y";
+      then "178shgxwc9kw9w9vwsvwxp8m8r6lssaw1i32vvmx9na01b4w5m4p"
+      else "0gyq97qsg7fys9cc5yj4kpcf3xxvdd5qgzal368yg9swps37g5yj";
   };
 
   dontBuild         = true;
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 1793d6172e2c..33ab2d8f0d94 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -2649,7 +2649,7 @@ in
 
   # The latest version used by elasticsearch, logstash, kibana and the the beats from elastic.
   elk5Version = "5.6.16";
-  elk6Version = "6.7.1";
+  elk6Version = "6.7.2";
   elk7Version = "7.0.1";
 
   elasticsearch5 = callPackage ../servers/search/elasticsearch/5.x.nix { };