diff --git a/release-notes.md b/release-notes.md
index eb23857f..3f7ab1bd 100644
--- a/release-notes.md
+++ b/release-notes.md
@@ -10,7 +10,7 @@
 *
 
 ## Dependency Updates
-* TSDK updated to 0.20.2 / CSDK 0.30.1
+* TSDK updated to 0.20.3 / CSDK 0.30.2
 
 # Release 2.1.7
 
diff --git a/ziti-edge-tunnel/build.bat b/ziti-edge-tunnel/build.bat
index 4accc835..b7c4a5dd 100644
--- a/ziti-edge-tunnel/build.bat
+++ b/ziti-edge-tunnel/build.bat
@@ -14,7 +14,7 @@ REM See the License for the specific language governing permissions and
 REM limitations under the License.
 REM
 SET REPO_URL=https://github.com/openziti/ziti-tunnel-sdk-c.git
-SET ZITI_TUNNEL_REPO_BRANCH=v0.20.2
+SET ZITI_TUNNEL_REPO_BRANCH=v0.20.3
 REM override the c sdk used in the build - leave blank for the same as specified in the tunneler sdk
 SET ZITI_SDK_C_BRANCH=
 SET ZITI_TUNNEL_REPO_URL=https://github.com/openziti/ziti-tunnel-sdk-c/releases/latest/download/ziti-edge-tunnel-Windows_x86_64.zip