diff --git a/.github/workflows/run_tests.yml b/.github/workflows/run_tests.yml
index 0e9edc40f..b2c343efe 100644
--- a/.github/workflows/run_tests.yml
+++ b/.github/workflows/run_tests.yml
@@ -22,7 +22,7 @@ jobs:
 
       - name: Install System dependencies
         shell: bash -l {0}
-        run: sudo apt install -y libaec-dev zlib1g-dev automake autoconf libcurl4-openssl-dev libjpeg-dev wget curl bzip2 m4 flex bison cmake
+        run: sudo apt update && sudo apt install -y libaec-dev zlib1g-dev automake autoconf libcurl4-openssl-dev libjpeg-dev wget curl bzip2 m4 flex bison cmake
 
         ###
         # Installing libhdf4 and libhdf5
@@ -71,7 +71,7 @@ jobs:
 
       - name: Install System dependencies
         shell: bash -l {0}
-        run: sudo apt install -y libaec-dev zlib1g-dev automake autoconf libcurl4-openssl-dev libjpeg-dev wget curl bzip2 m4 flex bison cmake
+        run: sudo apt update && sudo apt install -y libaec-dev zlib1g-dev automake autoconf libcurl4-openssl-dev libjpeg-dev wget curl bzip2 m4 flex bison cmake
 
 ###
 # Set Environmental Variables
@@ -164,7 +164,7 @@ jobs:
 
       - name: Install System dependencies
         shell: bash -l {0}
-        run: sudo apt install -y libaec-dev zlib1g-dev automake autoconf libcurl4-openssl-dev libjpeg-dev wget curl bzip2 m4 flex bison cmake
+        run: sudo apt update && sudo apt install -y libaec-dev zlib1g-dev automake autoconf libcurl4-openssl-dev libjpeg-dev wget curl bzip2 m4 flex bison cmake
 
 ###
 # Set Environmental Variables