diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 8ebd4181..173e3be2 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -187,7 +187,7 @@ jobs:
     - run: |
         python -m pip install git+https://git@github.com/kostrykin/galaxy.git@galaxy-image-analysis#subdirectory=packages/util
         python -m pip install git+https://git@github.com/kostrykin/galaxy.git@galaxy-image-analysis#subdirectory=packages/tool_util
-        python -m pip install pillow
+        python -m pip install pillow tifffile
 #
 # ---------------------------------------------------------
 #
diff --git a/.github/workflows/pr.yaml b/.github/workflows/pr.yaml
index e79ca154..8c119537 100644
--- a/.github/workflows/pr.yaml
+++ b/.github/workflows/pr.yaml
@@ -313,7 +313,7 @@ jobs:
     - run: |
         python -m pip install --no-dependencies git+https://git@github.com/kostrykin/galaxy.git@galaxy-image-analysis#subdirectory=packages/util
         python -m pip install --no-dependencies git+https://git@github.com/kostrykin/galaxy.git@galaxy-image-analysis#subdirectory=packages/tool_util
-        python -m pip install pillow
+        python -m pip install pillow tifffile
 #
 # ---------------------------------------------------------
 #