diff --git a/pyproject.toml b/pyproject.toml
index 0d7fed3..205cd19 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -31,7 +31,6 @@ dependencies = [
     "brainglobe>=1.2.0",
     "configobj",
     "fancylog>=0.0.7",
-    "imio",
     "multiprocessing-logging>=0.3.4",
     "natsort",
     "numpy",