diff --git a/Project.toml b/Project.toml
index 8a1acca73..5e2c84cea 100644
--- a/Project.toml
+++ b/Project.toml
@@ -18,6 +18,7 @@ QuartzImageIO = "dca85d43-d64c-5e67-8c65-017450d5d020"
 
 [compat]
 IntegralArrays = "0.1.3"
+Netpbm = "1"
 julia = "1.6"
 
 [extras]