diff --git a/README.md b/README.md
index ce3d790..7a5cbfe 100644
--- a/README.md
+++ b/README.md
@@ -16,7 +16,7 @@ This action currently supports these versions of MRI, JRuby and TruffleRuby:
 | ----------- | -------- |
 | `ruby` | 2.1.9, 2.2, all versions from 2.3.0 until 3.0.1, head, debug, mingw, mswin |
 | `jruby` | 9.1.17.0, 9.2.9.0 - 9.2.17.0, head |
-| `truffleruby` | 19.3.0 - 21.0.0, head |
+| `truffleruby` | 19.3.0 - 21.1.0, head |
 
 `ruby-debug` is the same as `ruby-head` but with assertions enabled (`-DRUBY_DEBUG=1`).  
 On Windows, `mingw` and `mswin` are `ruby-head` builds using the MSYS2/MinGW and the MSVC toolchains respectively.
diff --git a/dist/index.js b/dist/index.js
index ebc3b8f..930b110 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -45368,7 +45368,7 @@ function getVersions(platform) {
     "truffleruby": [
       "19.3.0", "19.3.1",
       "20.0.0", "20.1.0", "20.2.0", "20.3.0",
-      "21.0.0",
+      "21.0.0", "21.1.0",
       "head"
     ]
   }
diff --git a/ruby-builder-versions.js b/ruby-builder-versions.js
index 8c158c6..9164019 100644
--- a/ruby-builder-versions.js
+++ b/ruby-builder-versions.js
@@ -19,7 +19,7 @@ export function getVersions(platform) {
     "truffleruby": [
       "19.3.0", "19.3.1",
       "20.0.0", "20.1.0", "20.2.0", "20.3.0",
-      "21.0.0",
+      "21.0.0", "21.1.0",
       "head"
     ]
   }