diff --git a/.appveyor.yml b/.appveyor.yml
index 0cf1d5a9e..93140b89c 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -24,8 +24,8 @@ install:
 - mv c:\pillow-depends-master c:\pillow-depends
 - xcopy /S /Y c:\pillow-depends\test_images\* c:\pillow\tests\images
 - 7z x ..\pillow-depends\nasm-2.15.05-win64.zip -oc:\
-- ..\pillow-depends\gs9540w32.exe /S
-- path c:\nasm-2.15.05;C:\Program Files (x86)\gs\gs9.54.0\bin;%PATH%
+- ..\pillow-depends\gs9550w32.exe /S
+- path c:\nasm-2.15.05;C:\Program Files (x86)\gs\gs9.55.0\bin;%PATH%
 - cd c:\pillow\winbuild\
 - ps: |
         c:\python37\python.exe c:\pillow\winbuild\build_prepare.py -v --depends=C:\pillow-depends\
diff --git a/.github/workflows/test-windows.yml b/.github/workflows/test-windows.yml
index 6ef93b337..e2a1e8cd4 100644
--- a/.github/workflows/test-windows.yml
+++ b/.github/workflows/test-windows.yml
@@ -61,8 +61,8 @@ jobs:
         7z x winbuild\depends\nasm-2.15.05-win64.zip "-o$env:RUNNER_WORKSPACE\"
         echo "$env:RUNNER_WORKSPACE\nasm-2.15.05" >> $env:GITHUB_PATH
 
-        winbuild\depends\gs9540w32.exe /S
-        echo "C:\Program Files (x86)\gs\gs9.54.0\bin" >> $env:GITHUB_PATH
+        winbuild\depends\gs9550w32.exe /S
+        echo "C:\Program Files (x86)\gs\gs9.55.0\bin" >> $env:GITHUB_PATH
 
         xcopy /S /Y winbuild\depends\test_images\* Tests\images\