diff --git a/dist/index.js b/dist/index.js
index 2a84e29..07d0455 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -117,7 +117,7 @@ function run() {
         }
         catch (error) {
             core.debug((0, util_1.inspect)(error));
-            core.setFailed(error.message);
+            core.setFailed(utils.getErrorMessage(error));
         }
     });
 }
@@ -151,7 +151,7 @@ var __importStar = (this && this.__importStar) || function (mod) {
     return result;
 };
 Object.defineProperty(exports, "__esModule", ({ value: true }));
-exports.getStringAsArray = exports.getInputAsArray = void 0;
+exports.getErrorMessage = exports.getStringAsArray = exports.getInputAsArray = void 0;
 const core = __importStar(__nccwpck_require__(2186));
 function getInputAsArray(name, options) {
     return getStringAsArray(core.getInput(name, options));
@@ -164,6 +164,12 @@ function getStringAsArray(str) {
         .filter(x => x !== '');
 }
 exports.getStringAsArray = getStringAsArray;
+function getErrorMessage(error) {
+    if (error instanceof Error)
+        return error.message;
+    return String(error);
+}
+exports.getErrorMessage = getErrorMessage;
 
 
 /***/ }),
diff --git a/src/main.ts b/src/main.ts
index 1ea644b..4c5bb7f 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -81,9 +81,9 @@ async function run(): Promise<void> {
     } else {
       core.info(`File not found at path '${inputs.contentFilepath}'`)
     }
-  } catch (error: any) {
+  } catch (error) {
     core.debug(inspect(error))
-    core.setFailed(error.message)
+    core.setFailed(utils.getErrorMessage(error))
   }
 }
 
diff --git a/src/utils.ts b/src/utils.ts
index 59b21e7..52dc897 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -13,3 +13,8 @@ export function getStringAsArray(str: string): string[] {
     .map(s => s.trim())
     .filter(x => x !== '')
 }
+
+export function getErrorMessage(error: unknown) {
+  if (error instanceof Error) return error.message
+  return String(error)
+}