diff --git a/release-notes.md b/release-notes.md
index 9a04597d..12e4285b 100644
--- a/release-notes.md
+++ b/release-notes.md
@@ -10,7 +10,7 @@
 * [#452](https://github.com/openziti/desktop-edge-win/issues/452) Send identity updated events after mfa verify, mfa auth and service events
 
 ## Dependency Updates
-* none
+* update t-sdk v0.15.17 and c-sdk 0.26.8
 
 # Release 1.10.4
 
diff --git a/service/build.bat b/service/build.bat
index 87f9b2ce..9f18d542 100644
--- a/service/build.bat
+++ b/service/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=v0.15.16
+SET ZITI_TUNNEL_REPO_BRANCH=v0.15.17
 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=
 REM the number of TCP connections the tunneler sdk can have at any one time