diff --git a/dist/post_run/index.js b/dist/post_run/index.js
index e460dea..4f847f4 100644
--- a/dist/post_run/index.js
+++ b/dist/post_run/index.js
@@ -50003,7 +50003,7 @@ const getIntervalKey = (invalidationIntervalDays) => {
 function buildCacheKeys() {
     return __awaiter(this, void 0, void 0, function* () {
         const keys = [];
-        let userCacheKey = core.getInput(`cache-key`, { required: false }).trim();
+        const userCacheKey = core.getInput(`cache-key`, { required: false }).trim();
         if (userCacheKey) {
             keys.push(userCacheKey);
             return keys;
diff --git a/dist/run/index.js b/dist/run/index.js
index e0be925..c420e87 100644
--- a/dist/run/index.js
+++ b/dist/run/index.js
@@ -50013,7 +50013,7 @@ const getIntervalKey = (invalidationIntervalDays) => {
 function buildCacheKeys() {
     return __awaiter(this, void 0, void 0, function* () {
         const keys = [];
-        let userCacheKey = core.getInput(`cache-key`, { required: false }).trim();
+        const userCacheKey = core.getInput(`cache-key`, { required: false }).trim();
         if (userCacheKey) {
             keys.push(userCacheKey);
             return keys;
diff --git a/src/cache.ts b/src/cache.ts
index c57882c..b188878 100644
--- a/src/cache.ts
+++ b/src/cache.ts
@@ -37,7 +37,7 @@ const getIntervalKey = (invalidationIntervalDays: number): string => {
 
 async function buildCacheKeys(): Promise<string[]> {
   const keys = []
-  let userCacheKey = core.getInput(`cache-key`, { required: false }).trim()
+  const userCacheKey = core.getInput(`cache-key`, { required: false }).trim()
   if (userCacheKey) {
     keys.push(userCacheKey)
     return keys