diff --git a/dist/index.js b/dist/index.js
index 9278ab3..6425389 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -35868,7 +35868,7 @@ const core = __importStar(__nccwpck_require__(2186));
 const github_helper = __importStar(__nccwpck_require__(6932));
 const installer = __importStar(__nccwpck_require__(2574));
 const regexVersion = new RegExp("^\\d+(\\.\\d+)*(\\.\\d+)*$");
-const regexSha256sum = new RegExp("^[da-fA-F]{64}$");
+const regexSha256sum = new RegExp("^[\\da-fA-F]{64}$");
 function paramCheck(paramVersion, paramSha256sum, paramDownloadUrl) {
     // Validate version parameter
     if (!paramDownloadUrl &&
diff --git a/package-lock.json b/package-lock.json
index bfc326d..22f92e9 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "setup-ghidra",
-  "version": "2.0.2",
+  "version": "2.0.3",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "setup-ghidra",
-      "version": "2.0.2",
+      "version": "2.0.3",
       "license": "MIT",
       "dependencies": {
         "@actions/core": "^1.10.1",
diff --git a/package.json b/package.json
index c3ec0d3..37d3636 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "setup-ghidra",
-  "version": "2.0.2",
+  "version": "2.0.3",
   "description": "This action sets up a Ghidra environment for use in actions.",
   "main": "index.js",
   "scripts": {
diff --git a/src/setup-ghidra.ts b/src/setup-ghidra.ts
index 5da744b..c59ce8a 100644
--- a/src/setup-ghidra.ts
+++ b/src/setup-ghidra.ts
@@ -3,7 +3,7 @@ import * as github_helper from "./github_helper";
 import * as installer from "./installer";
 
 const regexVersion = new RegExp("^\\d+(\\.\\d+)*(\\.\\d+)*$");
-const regexSha256sum = new RegExp("^[da-fA-F]{64}$");
+const regexSha256sum = new RegExp("^[\\da-fA-F]{64}$");
 
 function paramCheck(
   paramVersion: string,