diff --git a/Gemfile b/Gemfile
index ef14aace277eb82396b16d970dbf01a2a4c3161b..ed6bba2abfc999a2231bbaad23da24d4af5a72f6 100644
--- a/Gemfile
+++ b/Gemfile
@@ -436,7 +436,7 @@ end
 
 # Gitaly GRPC client
 gem 'gitaly-proto', '~> 0.118.1', require: 'gitaly'
-gem 'grpc', '~> 1.11.0'
+gem 'grpc', '~> 1.15.0'
 
 # Locked until https://github.com/google/protobuf/issues/4210 is closed
 gem 'google-protobuf', '= 3.5.1'
diff --git a/Gemfile.lock b/Gemfile.lock
index dee77927d29865c7324d76d6a98d7bbe5c65a2f5..07bb8a684b6e8382a6cb43971728d5275ab6ad00 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -353,15 +353,14 @@ GEM
       representable (~> 3.0)
       retriable (>= 2.0, < 4.0)
     google-protobuf (3.5.1)
-    googleapis-common-protos-types (1.0.1)
+    googleapis-common-protos-types (1.0.2)
       google-protobuf (~> 3.0)
-    googleauth (0.6.2)
+    googleauth (0.6.6)
       faraday (~> 0.12)
       jwt (>= 1.4, < 3.0)
-      logging (~> 2.0)
       memoist (~> 0.12)
       multi_json (~> 1.11)
-      os (~> 0.9)
+      os (>= 0.9, < 2.0)
       signet (~> 0.7)
     gpgme (2.0.13)
       mini_portile2 (~> 2.1)
@@ -385,10 +384,9 @@ GEM
       railties
       sprockets-rails
     graphql (1.8.1)
-    grpc (1.11.0)
+    grpc (1.15.0)
       google-protobuf (~> 3.1)
       googleapis-common-protos-types (~> 1.0.0)
-      googleauth (>= 0.5.1, < 0.7)
     gssapi (1.2.0)
       ffi (>= 1.0.1)
     haml (5.0.4)
@@ -493,11 +491,7 @@ GEM
       xml-simple
     licensee (8.9.2)
       rugged (~> 0.24)
-    little-plugger (1.1.4)
     locale (2.1.2)
-    logging (2.2.2)
-      little-plugger (~> 1.1)
-      multi_json (~> 1.10)
     lograge (0.10.0)
       actionpack (>= 4)
       activesupport (>= 4)
@@ -604,7 +598,7 @@ GEM
     org-ruby (0.9.12)
       rubypants (~> 0.2)
     orm_adapter (0.5.0)
-    os (0.9.6)
+    os (1.0.0)
     parallel (1.12.1)
     parser (2.5.1.0)
       ast (~> 2.4.0)
@@ -872,7 +866,7 @@ GEM
     sidekiq-cron (0.6.0)
       rufus-scheduler (>= 3.3.0)
       sidekiq (>= 4.2.1)
-    signet (0.8.1)
+    signet (0.11.0)
       addressable (~> 2.3)
       faraday (~> 0.9)
       jwt (>= 1.5, < 3.0)
@@ -1081,7 +1075,7 @@ DEPENDENCIES
   grape_logging (~> 1.7)
   graphiql-rails (~> 1.4.10)
   graphql (~> 1.8.0)
-  grpc (~> 1.11.0)
+  grpc (~> 1.15.0)
   gssapi
   haml_lint (~> 0.26.0)
   hamlit (~> 2.8.8)
@@ -1224,4 +1218,4 @@ DEPENDENCIES
   wikicloth (= 0.8.1)
 
 BUNDLED WITH
-   1.16.4
+   1.16.6
diff --git a/Gemfile.rails5.lock b/Gemfile.rails5.lock
index d259cf46c9bd85e0a3e196062f70adfd5869bf5c..fcfadde12b8fdadbaafd1b9b4959f292c089894e 100644
--- a/Gemfile.rails5.lock
+++ b/Gemfile.rails5.lock
@@ -356,15 +356,14 @@ GEM
       representable (~> 3.0)
       retriable (>= 2.0, < 4.0)
     google-protobuf (3.5.1)
-    googleapis-common-protos-types (1.0.1)
+    googleapis-common-protos-types (1.0.2)
       google-protobuf (~> 3.0)
-    googleauth (0.6.2)
+    googleauth (0.6.6)
       faraday (~> 0.12)
       jwt (>= 1.4, < 3.0)
-      logging (~> 2.0)
       memoist (~> 0.12)
       multi_json (~> 1.11)
-      os (~> 0.9)
+      os (>= 0.9, < 2.0)
       signet (~> 0.7)
     gpgme (2.0.13)
       mini_portile2 (~> 2.1)
@@ -388,10 +387,9 @@ GEM
       railties
       sprockets-rails
     graphql (1.8.1)
-    grpc (1.11.0)
+    grpc (1.15.0)
       google-protobuf (~> 3.1)
       googleapis-common-protos-types (~> 1.0.0)
-      googleauth (>= 0.5.1, < 0.7)
     gssapi (1.2.0)
       ffi (>= 1.0.1)
     haml (5.0.4)
@@ -496,11 +494,7 @@ GEM
       xml-simple
     licensee (8.9.2)
       rugged (~> 0.24)
-    little-plugger (1.1.4)
     locale (2.1.2)
-    logging (2.2.2)
-      little-plugger (~> 1.1)
-      multi_json (~> 1.10)
     lograge (0.10.0)
       actionpack (>= 4)
       activesupport (>= 4)
@@ -608,7 +602,7 @@ GEM
     org-ruby (0.9.12)
       rubypants (~> 0.2)
     orm_adapter (0.5.0)
-    os (0.9.6)
+    os (1.0.0)
     parallel (1.12.1)
     parser (2.5.1.0)
       ast (~> 2.4.0)
@@ -880,7 +874,7 @@ GEM
     sidekiq-cron (0.6.0)
       rufus-scheduler (>= 3.3.0)
       sidekiq (>= 4.2.1)
-    signet (0.8.1)
+    signet (0.11.0)
       addressable (~> 2.3)
       faraday (~> 0.9)
       jwt (>= 1.5, < 3.0)
@@ -1090,7 +1084,7 @@ DEPENDENCIES
   grape_logging (~> 1.7)
   graphiql-rails (~> 1.4.10)
   graphql (~> 1.8.0)
-  grpc (~> 1.11.0)
+  grpc (~> 1.15.0)
   gssapi
   haml_lint (~> 0.26.0)
   hamlit (~> 2.8.8)
@@ -1233,4 +1227,4 @@ DEPENDENCIES
   wikicloth (= 0.8.1)
 
 BUNDLED WITH
-   1.16.4
+   1.16.6