diff --git a/dist/index.js b/dist/index.js
index f1684e5..6dc7025 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -979,7 +979,9 @@ class GitCommandManager {
             else {
                 args.push(globalConfig ? '--global' : '--local');
             }
-            args.push('--unset', configKey, configValue);
+            // Use --fixed-value to treat configValue as a literal string, not a regex pattern.
+            // This is important for file paths which contain regex special characters like '.'
+            args.push('--fixed-value', '--unset', configKey, configValue);
             const output = yield this.exec(args, { allowAllExitCodes: true });
             return output.exitCode === 0;
         });
diff --git a/src/git-command-manager.ts b/src/git-command-manager.ts
index 44d0177..b0ed1ae 100644
--- a/src/git-command-manager.ts
+++ b/src/git-command-manager.ts
@@ -368,7 +368,7 @@ export class GitCommandManager {
     } else {
       args.push(globalConfig ? '--global' : '--local')
     }
-    args.push('--unset', configKey, configValue)
+    args.push('--fixed-value', '--unset', configKey, configValue)
     const output = await this.exec(args, {allowAllExitCodes: true})
     return output.exitCode === 0
   }