diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index 9d58c92e15..8dd39d1739 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -6,10 +6,10 @@ updates:
     interval: daily
     time: "10:00"
     timezone: Europe/Budapest
-  open-pull-requests-limit: 5
+  open-pull-requests-limit: 0
   versioning-strategy: increase
   commit-message:
     prefix: build
     include: scope
   ignore:
-    - dependency-name: "husky"
\ No newline at end of file
+    - dependency-name: "husky"
diff --git a/src/decorator/string/IsBase64.ts b/src/decorator/string/IsBase64.ts
index 2c5cd3e5be..e7002e0e9a 100644
--- a/src/decorator/string/IsBase64.ts
+++ b/src/decorator/string/IsBase64.ts
@@ -26,7 +26,7 @@ export function IsBase64(
       name: IS_BASE64,
       constraints: [options],
       validator: {
-        validate: (value, args): boolean => isBase64(value),
+        validate: (value, args): boolean => isBase64(value, args?.constraints[0]),
         defaultMessage: buildMessage(eachPrefix => eachPrefix + '$property must be base64 encoded', validationOptions),
       },
     },
diff --git a/test/functional/validation-functions-and-decorators.spec.ts b/test/functional/validation-functions-and-decorators.spec.ts
index 78ceddcd6d..9f938616c4 100644
--- a/test/functional/validation-functions-and-decorators.spec.ts
+++ b/test/functional/validation-functions-and-decorators.spec.ts
@@ -1658,17 +1658,27 @@ describe('IsBase64', () => {
   const validValues = ['aGVsbG8='];
   const invalidValues = [null, undefined, 'hell*mynameisalex'];
 
+  const validBase64UrlValues = ['dGVzdA', 'dGV_zdA'];
+  const invalidBase64UrlValues = [null, undefined, 'dGVzdA=', 'MTIzNDU2Nzg5!!', 'SGVsbG8+V29ybGQ='];
+
   class MyClass {
     @IsBase64()
     someProperty: string;
   }
 
-  it('should not fail if validator.validate said that its valid', () => {
-    return checkValidValues(new MyClass(), validValues);
+  class MyClassWithConstraint {
+    @IsBase64({ urlSafe: true })
+    someProperty: string;
+  }
+
+  it('should not fail if validator.validate said that its valid', async () => {
+    await checkValidValues(new MyClass(), validValues);
+    await checkValidValues(new MyClassWithConstraint(), validBase64UrlValues);
   });
 
-  it('should fail if validator.validate said that its invalid', () => {
-    return checkInvalidValues(new MyClass(), invalidValues);
+  it('should fail if validator.validate said that its invalid', async () => {
+    await checkInvalidValues(new MyClass(), invalidValues);
+    await checkInvalidValues(new MyClassWithConstraint(), invalidBase64UrlValues);
   });
 
   it('should not fail if method in validator said that its valid', () => {