diff --git a/pypi_requirements.txt b/pypi_requirements.txt
index 62c0c0ddc..ad34e2ad8 100644
--- a/pypi_requirements.txt
+++ b/pypi_requirements.txt
@@ -6,6 +6,8 @@
 # These are also distributed through conda and not pip installed when using conda.
 attrs>=21.2.0,<=21.4.0
 cattrs==1.1.1
+imageio
+imageio-ffmpeg
 # certifi>=2017.4.17,<=2021.10.8
 jsmin
 jsonpickle==1.2