diff --git a/.github/workflows/verify-on-ubuntu.yml b/.github/workflows/verify-on-ubuntu.yml
index f07a231..67dc3f6 100644
--- a/.github/workflows/verify-on-ubuntu.yml
+++ b/.github/workflows/verify-on-ubuntu.yml
@@ -13,7 +13,6 @@ jobs:
       fail-fast: false
       matrix:
         os:
-        - ubuntu-16.04
         - ubuntu-18.04
         - ubuntu-20.04
     steps:
@@ -35,7 +34,6 @@ jobs:
       fail-fast: false
       matrix:
         os:
-        - ubuntu-16.04
         - ubuntu-18.04
         - ubuntu-20.04
     steps:
@@ -57,7 +55,6 @@ jobs:
       fail-fast: false
       matrix:
         os:
-        - ubuntu-16.04
         - ubuntu-18.04
         - ubuntu-20.04
     steps:
@@ -79,7 +76,6 @@ jobs:
       fail-fast: false
       matrix:
         os:
-        - ubuntu-16.04
         - ubuntu-18.04
         - ubuntu-20.04
     steps:
@@ -108,7 +104,6 @@ jobs:
       fail-fast: false
       matrix:
         os:
-        - ubuntu-16.04
         - ubuntu-18.04
         - ubuntu-20.04
     steps:
@@ -136,7 +131,6 @@ jobs:
       fail-fast: false
       matrix:
         os:
-        - ubuntu-16.04
         - ubuntu-18.04
         - ubuntu-20.04
     steps:
@@ -160,7 +154,6 @@ jobs:
       fail-fast: false
       matrix:
         os:
-        - ubuntu-16.04
         - ubuntu-18.04
         - ubuntu-20.04
     steps:
@@ -188,7 +181,6 @@ jobs:
       fail-fast: false
       matrix:
         os:
-        - ubuntu-16.04
         - ubuntu-18.04
         - ubuntu-20.04
     steps:
@@ -212,7 +204,6 @@ jobs:
       fail-fast: false
       matrix:
         os:
-        - ubuntu-16.04
         - ubuntu-18.04
         - ubuntu-20.04
     steps:
@@ -241,7 +232,6 @@ jobs:
       fail-fast: false
       matrix:
         os:
-        - ubuntu-16.04
         - ubuntu-18.04
         - ubuntu-20.04
     steps:
@@ -265,7 +255,6 @@ jobs:
       fail-fast: false
       matrix:
         os:
-        - ubuntu-16.04
         - ubuntu-18.04
         - ubuntu-20.04
     steps: