Update changelog.
diff --git a/resources/googleapis/CHANGELOG.md b/resources/googleapis/CHANGELOG.md
index d48d405..1402482 100644
--- a/resources/googleapis/CHANGELOG.md
+++ b/resources/googleapis/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 0.50.1
+
+* Re-generated with updated code generator to support Dart 2.
+
 ## 0.50.0
 
 * [api-new] serviceusage:v1
diff --git a/resources/googleapis_beta/CHANGELOG.md b/resources/googleapis_beta/CHANGELOG.md
index 4f137f1..171ccc3 100644
--- a/resources/googleapis_beta/CHANGELOG.md
+++ b/resources/googleapis_beta/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 0.45.1
+
+* Re-generated with updated code generator to support Dart 2.
+
 ## 0.45.0
 
 * [api] dlp:v2beta2