diff --git a/steep/Gemfile b/steep/Gemfile
index 9fc874c55..dff7ee2a7 100644
--- a/steep/Gemfile
+++ b/steep/Gemfile
@@ -1,4 +1,4 @@
 source "https://rubygems.org"
 
-gem "rbs", "~> 3.9.pre"
+gem "rbs", "~> 3.9"
 gem "steep", "~> 1.10"
diff --git a/steep/Gemfile.lock b/steep/Gemfile.lock
index 2df930cef..51d16a8aa 100644
--- a/steep/Gemfile.lock
+++ b/steep/Gemfile.lock
@@ -42,7 +42,7 @@ GEM
     rb-fsevent (0.11.2)
     rb-inotify (0.11.1)
       ffi (~> 1.0)
-    rbs (3.9.0)
+    rbs (3.9.1)
       logger
     securerandom (0.4.1)
     steep (1.10.0)
@@ -76,7 +76,7 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
-  rbs (~> 3.9.pre)
+  rbs (~> 3.9)
   steep (~> 1.10)
 
 BUNDLED WITH