diff --git a/src/transforms/v2-to-v3/__fixtures__/config/endpointCacheSize.input.js b/src/transforms/v2-to-v3/__fixtures__/config/endpointCacheSize.input.js
new file mode 100644
index 000000000..82308ec35
--- /dev/null
+++ b/src/transforms/v2-to-v3/__fixtures__/config/endpointCacheSize.input.js
@@ -0,0 +1,5 @@
+import AWS from "aws-sdk";
+
+const config = new AWS.Config({
+  endpointCacheSize: 100
+});
\ No newline at end of file
diff --git a/src/transforms/v2-to-v3/__fixtures__/config/endpointCacheSize.output.js b/src/transforms/v2-to-v3/__fixtures__/config/endpointCacheSize.output.js
new file mode 100644
index 000000000..4c57f3057
--- /dev/null
+++ b/src/transforms/v2-to-v3/__fixtures__/config/endpointCacheSize.output.js
@@ -0,0 +1,3 @@
+const config = {
+  endpointCacheSize: 100
+};
\ No newline at end of file
diff --git a/src/transforms/v2-to-v3/config/AWS_CONFIG_KEY_MAP.ts b/src/transforms/v2-to-v3/config/AWS_CONFIG_KEY_MAP.ts
index cbffe4059..aabe993b9 100644
--- a/src/transforms/v2-to-v3/config/AWS_CONFIG_KEY_MAP.ts
+++ b/src/transforms/v2-to-v3/config/AWS_CONFIG_KEY_MAP.ts
@@ -19,6 +19,7 @@ export const AWS_CONFIG_KEY_MAP: Record<string, AwsConfigKeyStatus> = {
     deprecationMessage: "The clock skew correction is applied by default.",
   },
   credentials: {},
+  endpointCacheSize: {},
   systemClockOffset: {},
   region: {},
 };