diff --git a/.ruby-version b/.ruby-version
index fcdb2e109..4d54daddb 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-4.0.0
+4.0.2
diff --git a/Gemfile b/Gemfile
index 7dd113e1c..eb6c76df1 100644
--- a/Gemfile
+++ b/Gemfile
@@ -18,7 +18,7 @@ gem "maxitest", "~> 6.0"
 gem "minitest-difftastic", "~> 0.2"
 gem "rake", "~> 13.2"
 gem "rake-compiler", "~> 1.3"
-gem "rake-compiler-dock", "~> 1.11"
+gem "rake-compiler-dock", "~> 1.12"
 gem "rbs-inline", "~> 0.12"
 gem "reactionview", "~> 0.3.0"
 gem "reline", "~> 0.6"
diff --git a/Gemfile.lock b/Gemfile.lock
index 58cbeab56..f33121579 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -244,7 +244,7 @@ GEM
     rake (13.3.1)
     rake-compiler (1.3.1)
       rake
-    rake-compiler-dock (1.11.1)
+    rake-compiler-dock (1.12.0)
     rb-fsevent (0.11.2)
     rb-inotify (0.11.1)
       ffi (~> 1.0)
@@ -326,7 +326,7 @@ DEPENDENCIES
   prism!
   rake (~> 13.2)
   rake-compiler (~> 1.3)
-  rake-compiler-dock (~> 1.11)
+  rake-compiler-dock (~> 1.12)
   rbs!
   rbs-inline (~> 0.12)
   reactionview (~> 0.3.0)