diff --git a/Tasks/JsonPatch/package.json b/Tasks/JsonPatch/package.json
index c8e5d19..6a920fa 100644
--- a/Tasks/JsonPatch/package.json
+++ b/Tasks/JsonPatch/package.json
@@ -6,7 +6,7 @@
     "q": "^1.5.1",
     "fs-extra": "8.0.1",
     "micromatch": "^4.0.2",
-    "fast-json-patch": "2.1.0",
+    "fast-json-patch": "3.1.1",
     "xregexp": "4.2.4",
     "azure-pipelines-task-lib": "^2.9.3",
     "json5": "2.1.0",
diff --git a/Tests/JsonPatch/jsonPatcher.spec.ts b/Tests/JsonPatch/jsonPatcher.spec.ts
index 0bf78b0..29fd0b6 100644
--- a/Tests/JsonPatch/jsonPatcher.spec.ts
+++ b/Tests/JsonPatch/jsonPatcher.spec.ts
@@ -45,7 +45,7 @@ describe('JSON Patcher', () => {
 
       var patcher = new jsonPatcher.JsonPatcher([
         {
-          op: 'add',
+          op: 'replace',
           path: '/~1foo',
           value: '12'
         },