diff --git a/docker/Gemfile b/docker/Gemfile
index cd67ec9..d389597 100644
--- a/docker/Gemfile
+++ b/docker/Gemfile
@@ -1,6 +1,6 @@
 source ENV['GEM_SOURCE'] || 'https://rubygems.org'
 
-gem 'vmpooler',                    '~> 3.0'
+gem 'vmpooler',                    '~> 3.4'
 gem 'vmpooler-dns-gcp',            '~> 1.0'
 # Remove temporarily until a stable minor release is published
 # gem 'vmpooler-provider-ec2',       '~> 0.0.1'
diff --git a/docker/Gemfile.lock b/docker/Gemfile.lock
index f5677db..3a8bfe3 100644
--- a/docker/Gemfile.lock
+++ b/docker/Gemfile.lock
@@ -45,6 +45,7 @@ GEM
       os (>= 0.9, < 2.0)
       signet (>= 0.16, < 2.a)
     httpclient (2.8.3)
+    json (2.6.3)
     json (2.6.3-java)
     jwt (2.7.1)
     memoist (0.16.2)
@@ -53,9 +54,12 @@ GEM
     mustermann (3.0.0)
       ruby2_keywords (~> 0.0.1)
     net-ldap (0.18.0)
+    nio4r (2.5.9)
     nio4r (2.5.9-java)
     nokogiri (1.15.4-java)
       racc (~> 1.4)
+    nokogiri (1.15.4-x86_64-linux)
+      racc (~> 1.4)
     opentelemetry-api (1.2.2)
     opentelemetry-common (0.20.0)
       opentelemetry-api (~> 1.0)
@@ -105,8 +109,11 @@ GEM
     pickup (0.0.11)
     prometheus-client (4.2.1)
     public_suffix (5.0.3)
-    puma (6.3.0-java)
+    puma (6.3.1)
       nio4r (~> 2.0)
+    puma (6.3.1-java)
+      nio4r (~> 2.0)
+    racc (1.7.1)
     racc (1.7.1-java)
     rack (2.2.8)
     rack-protection (3.1.0)
@@ -119,7 +126,7 @@ GEM
       optimist (~> 3.0)
     redis (5.0.7)
       redis-client (>= 0.9.0)
-    redis-client (0.15.0)
+    redis-client (0.16.0)
       connection_pool
     representable (3.2.0)
       declarative (< 0.1.0)
@@ -145,7 +152,7 @@ GEM
     tilt (2.2.0)
     trailblazer-option (0.1.2)
     uber (0.1.0)
-    vmpooler (3.3.0)
+    vmpooler (3.4.0)
       concurrent-ruby (~> 1.1)
       connection_pool (~> 2.4)
       deep_merge (~> 1.2)
@@ -182,9 +189,10 @@ GEM
 
 PLATFORMS
   universal-java-11
+  x86_64-linux
 
 DEPENDENCIES
-  vmpooler (~> 3.0)
+  vmpooler (~> 3.4)
   vmpooler-dns-gcp (~> 1.0)
   vmpooler-provider-gce (~> 1.0)
   vmpooler-provider-vsphere (~> 3.0)