diff --git a/pyproject.toml b/pyproject.toml
index f232d0fa6c..a7304055fb 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -36,6 +36,7 @@ dependencies = [
 dynamic = ["version", "readme"]
 
 [project.optional-dependencies]
+dev = ["flopy[lint,test,optional,doc]"]
 lint = [
     "black",
     "cffconvert",