diff --git a/.github/workflows/build_cmake.yml b/.github/workflows/build_cmake.yml
index 794b38c6c1c..e0986c881a8 100644
--- a/.github/workflows/build_cmake.yml
+++ b/.github/workflows/build_cmake.yml
@@ -9,7 +9,7 @@ on:
 env:
   QT_VERSION: 6.6.2
   MACOS_DEPLOYMENT_TARGET: 11.0
-  CLANG_VERSION: 17.0.1
+  CLANG_VERSION: 18.1.5
   ELFUTILS_VERSION: 0.175
   CMAKE_VERSION: 3.21.1
   NINJA_VERSION: 1.10.2
diff --git a/coin/instructions/build.yaml b/coin/instructions/build.yaml
index 1972965b512..5434885e1c7 100644
--- a/coin/instructions/build.yaml
+++ b/coin/instructions/build.yaml
@@ -16,7 +16,7 @@ instructions:
         maxTimeBetweenOutput: 360
         userMessageOnFailure: "Failed to extract elfutils package, check logs."
       - type: ExecuteCommand
-        command: "curl --fail -L --retry 5 --retry-delay 5 -o {{.AgentWorkingDir}}/build/qt_temp/libclang.7z {{.Env.LLVM_BASE_URL}}-linux-Rhel8.4-gcc10.3-x86_64.7z"
+        command: "curl --fail -L --retry 5 --retry-delay 5 -o {{.AgentWorkingDir}}/build/qt_temp/libclang.7z {{.Env.LLVM_BASE_URL}}-linux-Rhel8.6-gcc10.3-x86_64.7z"
         maxTimeInSeconds: 3600
         maxTimeBetweenOutput: 360
         userMessageOnFailure: "Failed to download LLVM package, check logs."
diff --git a/coin/instructions/common_environment.yaml b/coin/instructions/common_environment.yaml
index e2d11901180..5b4f8ad02b5 100644
--- a/coin/instructions/common_environment.yaml
+++ b/coin/instructions/common_environment.yaml
@@ -7,7 +7,7 @@ instructions:
         variableValue: "RelWithDebInfo"
       - type: EnvironmentVariable
         variableName: LLVM_BASE_URL
-        variableValue: https://ci-files02-hki.ci.qt.io/packages/jenkins/qtcreator_libclang/libclang-release_17.0.1-based
+        variableValue: https://ci-files02-hki.ci.qt.io/packages/jenkins/qtcreator_libclang/libclang-release_18.1.5-based
       - type: EnvironmentVariable
         variableName: QTC_QT_BASE_URL
         variableValue: "https://ci-files02-hki.ci.qt.io/packages/jenkins/archive/qt/6.6/6.6.2-released/Qt"