diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 0b8bf6929..848999328 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -13,7 +13,7 @@ jobs:
     strategy:
       matrix:
         image: [ubuntu-20.04]
-        php: [7.3.27, 7.4.16]
+        php: [7.3.27, 7.4.15]
 
     steps:
       - uses: actions/checkout@v2 #needed for build.sh
@@ -37,7 +37,7 @@ jobs:
       fail-fast: false
       matrix:
         image: [ubuntu-20.04]
-        php: [7.3.27, 7.4.16]
+        php: [7.3.27, 7.4.15]
 
     steps:
       - uses: actions/checkout@v2
@@ -87,7 +87,7 @@ jobs:
       fail-fast: false
       matrix:
         image: [ubuntu-20.04]
-        php: [7.3.27, 7.4.16]
+        php: [7.3.27, 7.4.15]
 
     steps:
       - uses: actions/checkout@v2
@@ -137,7 +137,7 @@ jobs:
       fail-fast: false
       matrix:
         image: [ubuntu-20.04]
-        php: [7.3.27, 7.4.16]
+        php: [7.3.27, 7.4.15]
 
     steps:
       - uses: actions/checkout@v2