diff --git a/datascience/Dockerfile b/datascience/Dockerfile
index 92f873f..bd829f8 100644
--- a/datascience/Dockerfile
+++ b/datascience/Dockerfile
@@ -135,6 +135,7 @@ RUN gem install \
         red-arrow \
         red-arrow-numo-narray \
         red-arrow-nmatrix \
+        red-arrow-pycall \
         red-chainer \
         red-datasets \
         red-datasets-arrow \
diff --git a/minimal/Dockerfile b/minimal/Dockerfile
index 27ee9a2..38ef2b7 100644
--- a/minimal/Dockerfile
+++ b/minimal/Dockerfile
@@ -135,6 +135,7 @@ RUN gem install \
         red-arrow \
         red-arrow-numo-narray \
         red-arrow-nmatrix \
+        red-arrow-pycall \
         red-chainer \
         red-datasets \
         red-datasets-arrow \