diff --git a/DEPS b/DEPS
index 5c4e09b556e..f33be2c4503 100644
--- a/DEPS
+++ b/DEPS
@@ -50,7 +50,7 @@ vars = {
   # Checked-in SDK version. The checked-in SDK is a Dart SDK distribution
   # in a cipd package used to run Dart scripts in the build and test
   # infrastructure, which is automatically built on the release commits.
-  "sdk_tag": "version:3.3.0-279.1.beta",
+  "sdk_tag": "version:3.4.0-108.0.dev",
 
   # co19 is a cipd package automatically generated for each co19 commit.
   # Use tests/co19/update.sh to update this hash.