Whups, docker files are lagging github (#601)

diff --git a/Dockerfile b/Dockerfile
index ddd6aac..bd9d510 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,7 +6,7 @@
 # To retrieve this value, please run the following in your closest shell:
 #
 # $ (cd flutter && git rev-parse HEAD)
-ARG FLUTTER_COMMIT=916c3ac648aa0498a70f32b5fc4f6c51447628e3
+ARG FLUTTER_COMMIT=81a45ec2e5f80fa71d5135f1702ce540558b416d
 
 # We install unzip and remove the apt-index again to keep the
 # docker image diff small.
diff --git a/cloud_run.Dockerfile b/cloud_run.Dockerfile
index 3908e93..f18ca64 100644
--- a/cloud_run.Dockerfile
+++ b/cloud_run.Dockerfile
@@ -6,7 +6,7 @@
 # To retrieve this value, please run the following in your closest shell:
 #
 # $ (cd flutter && git rev-parse HEAD)
-ARG FLUTTER_COMMIT=916c3ac648aa0498a70f32b5fc4f6c51447628e3
+ARG FLUTTER_COMMIT=81a45ec2e5f80fa71d5135f1702ce540558b416d
 
 # We install unzip and remove the apt-index again to keep the
 # docker image diff small.