diff --git a/.github/workflows/build-kvx-buildroot.yml b/.github/workflows/build-kvx-buildroot.yml
index 2c0bd5c..b333385 100644
--- a/.github/workflows/build-kvx-buildroot.yml
+++ b/.github/workflows/build-kvx-buildroot.yml
@@ -6,7 +6,7 @@ jobs:
   build:
     strategy:
       matrix:
-        os: [ubuntu-18.04, ubuntu-20.04, ubuntu-latest]
+        os: [ubuntu-20.04, ubuntu-latest]
 
     runs-on: ${{ matrix.os }}
 
diff --git a/.github/workflows/build-kvx-cos-llvm.yml b/.github/workflows/build-kvx-cos-llvm.yml
index 9d28c8a..1d01f9b 100644
--- a/.github/workflows/build-kvx-cos-llvm.yml
+++ b/.github/workflows/build-kvx-cos-llvm.yml
@@ -11,7 +11,7 @@ jobs:
   build:
     strategy:
       matrix:
-        os: [ubuntu-18.04, ubuntu-20.04, ubuntu-22.04, ubuntu-latest]
+        os: [ubuntu-20.04, ubuntu-22.04, ubuntu-latest]
 
     runs-on: ${{ matrix.os }}
     
diff --git a/.github/workflows/build-kvx-elf.yml b/.github/workflows/build-kvx-elf.yml
index 3490914..fcbe8ed 100644
--- a/.github/workflows/build-kvx-elf.yml
+++ b/.github/workflows/build-kvx-elf.yml
@@ -12,7 +12,7 @@ jobs:
   build:
     strategy:
       matrix:
-        os: [ubuntu-18.04, ubuntu-20.04, ubuntu-22.04, ubuntu-latest]
+        os: [ubuntu-20.04, ubuntu-22.04, ubuntu-latest]
 
     runs-on: ${{ matrix.os }}
     
diff --git a/.github/workflows/release-kvx-elf.yml b/.github/workflows/release-kvx-elf.yml
index 522b8ad..2d49a40 100644
--- a/.github/workflows/release-kvx-elf.yml
+++ b/.github/workflows/release-kvx-elf.yml
@@ -9,7 +9,7 @@ jobs:
   build:
     strategy:
       matrix:
-        os: [ubuntu-18.04, ubuntu-20.04, ubuntu-22.04, ubuntu-latest]
+        os: [ubuntu-20.04, ubuntu-22.04, ubuntu-latest]
 
     runs-on: ${{ matrix.os }}
 
@@ -54,7 +54,7 @@ jobs:
     needs: release
     strategy:
       matrix:
-        os: [ubuntu-18.04, ubuntu-20.04, ubuntu-22.04]
+        os: [ubuntu-20.04, ubuntu-22.04]
     runs-on: ${{ matrix.os }}
     steps:
     - name: Download toolchain from build
diff --git a/.github/workflows/release-kvx-llvm.yml b/.github/workflows/release-kvx-llvm.yml
index ed00484..0b577b3 100644
--- a/.github/workflows/release-kvx-llvm.yml
+++ b/.github/workflows/release-kvx-llvm.yml
@@ -9,7 +9,7 @@ jobs:
   build:
     strategy:
       matrix:
-        os: [ubuntu-18.04, ubuntu-20.04, ubuntu-22.04, ubuntu-latest]
+        os: [ubuntu-20.04, ubuntu-22.04, ubuntu-latest]
 
     runs-on: ${{ matrix.os }}
 
@@ -54,7 +54,7 @@ jobs:
     needs: release
     strategy:
       matrix:
-        os: [ubuntu-18.04, ubuntu-20.04, ubuntu-22.04]
+        os: [ubuntu-20.04, ubuntu-22.04]
     runs-on: ${{ matrix.os }}
     steps:
     - name: Download toolchain from build