diff --git a/data-prepper-api/src/main/java/org/opensearch/dataprepper/model/event/JacksonEventKey.java b/data-prepper-api/src/main/java/org/opensearch/dataprepper/model/event/JacksonEventKey.java
index 50d59a6585..f81edc34fc 100644
--- a/data-prepper-api/src/main/java/org/opensearch/dataprepper/model/event/JacksonEventKey.java
+++ b/data-prepper-api/src/main/java/org/opensearch/dataprepper/model/event/JacksonEventKey.java
@@ -158,6 +158,7 @@ private static boolean isValidKey(final String key) {
                     || c == '.'
                     || c == '-'
                     || c == '_'
+                    || c == '~'
                     || c == '@'
                     || c == '/'
                     || c == '['
diff --git a/data-prepper-api/src/test/java/org/opensearch/dataprepper/model/event/JacksonEventKeyTest.java b/data-prepper-api/src/test/java/org/opensearch/dataprepper/model/event/JacksonEventKeyTest.java
index 5eb696a374..436bb515bf 100644
--- a/data-prepper-api/src/test/java/org/opensearch/dataprepper/model/event/JacksonEventKeyTest.java
+++ b/data-prepper-api/src/test/java/org/opensearch/dataprepper/model/event/JacksonEventKeyTest.java
@@ -68,7 +68,8 @@ void constructor_throws_with_invalid_key(final String key) {
             "key-with-hyphen",
             "key_with_underscore",
             "key@with@at",
-            "key[with]brackets"
+            "key[with]brackets",
+            "key~1withtilda"
     })
     void getKey_returns_expected_result(final String key) {
         assertThat(new JacksonEventKey(key).getKey(), equalTo(key));