diff --git a/default.json b/default.json
index 095c0ee..5d44235 100644
--- a/default.json
+++ b/default.json
@@ -138,6 +138,18 @@
       "packageNameTemplate": "renovatebot/renovate",
       "versioningTemplate": "semver",
       "extractVersionTemplate": "^v?(?<version>.*)$"
+    },
+    {
+      "description": "Update OpenTofu version in workflows",
+      "fileMatch": [
+        ".github/workflows/.*\\.ya?ml$",
+        ".gitea/workflows/.*\\.ya?ml$"
+      ],
+      "matchStrings": ["OPENTOFU_VERSION: \\\"(?<currentValue>.*?)\\\""],
+      "datasourceTemplate": "github-releases",
+      "packageNameTemplate": "opentofu/opentofu",
+      "versioningTemplate": "semver",
+      "extractVersionTemplate": "^v?(?<version>.*)$"
     }
   ]
 }