diff --git a/iam/api/Access/Access.csproj b/iam/api/Access/Access.csproj
index 7e54ec05739..2c8c716e13b 100644
--- a/iam/api/Access/Access.csproj
+++ b/iam/api/Access/Access.csproj
@@ -6,7 +6,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Google.Apis.Iam.v1" Version="1.72.0.3935" />
+    <PackageReference Include="Google.Apis.Iam.v1" Version="1.73.0.4096" />
     <PackageReference Include="Google.Apis.Cloudresourcemanager.v1" Version="1.72.0.3959" />
   </ItemGroup>
 
diff --git a/iam/api/CustomRoles/CustomRoles.csproj b/iam/api/CustomRoles/CustomRoles.csproj
index 4b371630c8e..71ef1899315 100644
--- a/iam/api/CustomRoles/CustomRoles.csproj
+++ b/iam/api/CustomRoles/CustomRoles.csproj
@@ -7,6 +7,6 @@
 
   <ItemGroup>
     <PackageReference Include="CommandLineParser" Version="2.9.1" />
-    <PackageReference Include="Google.Apis.Iam.v1" Version="1.72.0.3935" />
+    <PackageReference Include="Google.Apis.Iam.v1" Version="1.73.0.4096" />
   </ItemGroup>
 </Project>
diff --git a/iam/api/QuickStart/QuickStart.csproj b/iam/api/QuickStart/QuickStart.csproj
index 0793918b7ec..7f5a1612235 100644
--- a/iam/api/QuickStart/QuickStart.csproj
+++ b/iam/api/QuickStart/QuickStart.csproj
@@ -5,6 +5,6 @@
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="Google.Apis.Cloudresourcemanager.v1" Version="1.72.0.3959" />
-    <PackageReference Include="Google.Apis.Iam.v1" Version="1.72.0.3935" />
+    <PackageReference Include="Google.Apis.Iam.v1" Version="1.73.0.4096" />
   </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/iam/api/ServiceAccountKeys/ServiceAccountKeys.csproj b/iam/api/ServiceAccountKeys/ServiceAccountKeys.csproj
index ce60bc54571..4ab865b8b7a 100644
--- a/iam/api/ServiceAccountKeys/ServiceAccountKeys.csproj
+++ b/iam/api/ServiceAccountKeys/ServiceAccountKeys.csproj
@@ -7,7 +7,7 @@
 
   <ItemGroup>
     <PackageReference Include="CommandLineParser" Version="2.9.1" />
-    <PackageReference Include="Google.Apis.Iam.v1" Version="1.72.0.3935" />
+    <PackageReference Include="Google.Apis.Iam.v1" Version="1.73.0.4096" />
   </ItemGroup>
   
 </Project>
diff --git a/iam/api/ServiceAccounts/ServiceAccounts.csproj b/iam/api/ServiceAccounts/ServiceAccounts.csproj
index 6394b8d05e9..1e6d15131d4 100644
--- a/iam/api/ServiceAccounts/ServiceAccounts.csproj
+++ b/iam/api/ServiceAccounts/ServiceAccounts.csproj
@@ -7,7 +7,7 @@
   
   <ItemGroup>
     <PackageReference Include="CommandLineParser" Version="2.9.1" />
-    <PackageReference Include="Google.Apis.Iam.v1" Version="1.72.0.3935" />
+    <PackageReference Include="Google.Apis.Iam.v1" Version="1.73.0.4096" />
   </ItemGroup>
 
 </Project>
diff --git a/spanner/api/Spanner.Samples.Tests/Spanner.Samples.Tests.csproj b/spanner/api/Spanner.Samples.Tests/Spanner.Samples.Tests.csproj
index 6788aa3d3d5..18758df8faf 100644
--- a/spanner/api/Spanner.Samples.Tests/Spanner.Samples.Tests.csproj
+++ b/spanner/api/Spanner.Samples.Tests/Spanner.Samples.Tests.csproj
@@ -12,7 +12,7 @@
 
   <ItemGroup>
     <PackageReference Include="Google.Cloud.Kms.V1" Version="3.21.0" />
-    <PackageReference Include="Google.Apis.Iam.v1" Version="1.72.0.3935" />
+    <PackageReference Include="Google.Apis.Iam.v1" Version="1.73.0.4096" />
     <PackageReference Include="JUnitTestLogger" Version="1.1.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.0.0" />
     <PackageReference Include="xunit" Version="2.9.3" />