diff --git a/pyproject.toml b/pyproject.toml
index 71ace4d9..35bf8d32 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -36,10 +36,10 @@ joblib = "^1.3.2"
 meshcat = "^0.3.2"
 omegaconf = "^2.3.0"
 open3d = "^0.17.0"
-opencv-contrib-python = { version = "^4.8.0.76", optional = true }
-opencv-python = { version = "^4.8.0.76", optional = true }
+opencv-contrib-python = {optional = true, version = "^4.8.0.76"}
+opencv-python = {optional = true, version = "^4.8.0.76"}
 panda3d = "=1.10.13"
-pin = { version = "^2.6.20", optional = true }
+pin = {optional = true, version = "^2.6.20"}
 plyfile = "^1.0.1"
 pybind11 = "^2.10.4"
 pybullet = "^3.2.5"