diff --git a/.gitignore b/.gitignore
index 5d60b2a..fd778ce 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,3 +10,4 @@
 /SPIRV-Tools-sdk-1.3.283.0.tar.gz
 /SPIRV-Tools-sdk-1.4.304.0.tar.gz
 /SPIRV-Tools-sdk-1.4.313.0.tar.gz
+/SPIRV-Tools-sdk-1.4.328.1.tar.gz
diff --git a/sources b/sources
index 5e45174..9fb710a 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (SPIRV-Tools-sdk-1.4.313.0.tar.gz) = 2e0cffc9550fa95da8622424012e1fa2decbc6b981e30114ac0b7a332d7a9abed9a2138dc83ff6eb0b6d3946c1f1b43679de0754ccb98380d4981e8130a5e248
+SHA512 (SPIRV-Tools-sdk-1.4.328.1.tar.gz) = 2717355b34bb9e257cdc7046ddee81dcdfe92e66ddf057f0b7cb4024ce276db6b89c37cb977d8c1a4d944260dfd37420b1049ffaeea84cbaf79d5911f5bda241
diff --git a/spirv-tools.spec b/spirv-tools.spec
index 7dcb737..7b95d76 100644
--- a/spirv-tools.spec
+++ b/spirv-tools.spec
@@ -1,9 +1,9 @@
 %undefine __cmake_in_source_build
 
-%global sdkver 1.4.313.0
+%global sdkver 1.4.328.1
 
 Name:           spirv-tools
-Version:        2025.2
+Version:        2025.4
 Release:        %autorelease
 Summary:        API and commands for processing SPIR-V modules
 
@@ -38,6 +38,7 @@ library files for %{name}
 
 %package        devel
 Summary:        Development files for %{name}
+Requires:       %{name} = %{version}-%{release}
 Requires:       %{name}-libs%{?_isa} = %{version}-%{release}
 
 %description    devel
@@ -66,6 +67,7 @@ Development files for %{name}
 %{_bindir}/spirv-as
 %{_bindir}/spirv-cfg
 %{_bindir}/spirv-dis
+%{_bindir}/spirv-diff
 %{_bindir}/spirv-lesspipe.sh
 %{_bindir}/spirv-link
 %{_bindir}/spirv-lint