diff --git a/.changes/6604e856-ab5c-44ab-968b-3a2c57e7a35b.json b/.changes/6604e856-ab5c-44ab-968b-3a2c57e7a35b.json
new file mode 100644
index 00000000000..7e88483fa40
--- /dev/null
+++ b/.changes/6604e856-ab5c-44ab-968b-3a2c57e7a35b.json
@@ -0,0 +1,5 @@
+{
+    "id": "6604e856-ab5c-44ab-968b-3a2c57e7a35b",
+    "type": "misc",
+    "description": "Upgrade to Smithy 1.51.0"
+}
\ No newline at end of file
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 2084e480fbc..7b5b60d60f8 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -9,11 +9,11 @@ coroutines-version = "1.9.0"
 atomicfu-version = "0.24.0"
 
 # smithy-kotlin codegen and runtime are versioned separately
-smithy-kotlin-runtime-version = "1.3.14"
-smithy-kotlin-codegen-version = "0.33.14"
+smithy-kotlin-runtime-version = "1.3.15"
+smithy-kotlin-codegen-version = "0.33.15"
 
 # codegen
-smithy-version = "1.50.0"
+smithy-version = "1.51.0"
 
 # testing
 junit-version = "5.10.1"