diff --git a/pyproject.toml b/pyproject.toml
index 5b3fe7b7..bb8f6031 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -42,7 +42,7 @@ dependencies = [
     "ansys-platform-instancemanagement==1.1.2",
     "ansys-pyensight-core==0.6.2",
     "ansys-openapi-common==1.2.2",
-    "ansys-optislang-core==0.4.0",
+    "ansys-optislang-core==0.4.2",
     "ansys-seascape==0.2.0",
     "ansys-sherlock-core==0.4.0",
     "ansys-systemcoupling-core==0.3.0",