diff --git a/requirements.txt b/requirements.txt
index 8adc088..297eee0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -45,4 +45,7 @@ plotly>=5,<6
 bqplot
 
 nblink
-openpiv
+scikit_image
+natsort
+importlib_resources
+openpiv==0.25.3 --no-deps