diff --git a/partcad/src/partcad/part_config.py b/partcad/src/partcad/part_config.py
index 2740aab..9f91913 100644
--- a/partcad/src/partcad/part_config.py
+++ b/partcad/src/partcad/part_config.py
@@ -43,6 +43,11 @@ def normalize(name, config):
                         "type": "bool",
                         "default": param_value,
                     }
+                elif isinstance(param_value, list):
+                    config["parameters"][param_name] = {
+                        "type": "array",
+                        "default": param_value,
+                    }
                 # All params are float unless another type is explicitly speciifed
                 elif (
                     isinstance(param_value, dict) and not "type" in param_value
diff --git a/partcad/src/partcad/project.py b/partcad/src/partcad/project.py
index 24e1cc6..9ac2240 100644
--- a/partcad/src/partcad/project.py
+++ b/partcad/src/partcad/project.py
@@ -559,6 +559,8 @@ def get_sketch(self, sketch_name, func_params=None) -> sketch.Sketch:
                             config["parameters"][param_name]["default"] = bool(
                                 param_value
                             )
+                    elif config["parameters"][param_name]["type"] == "array":
+                        config["parameters"][param_name]["default"] = param_value
             else:
                 # Filling "with"
                 if not "with" in config:
@@ -796,6 +798,8 @@ def get_part(self, part_name, func_params=None, quiet=False) -> part.Part:
                             config["parameters"][param_name]["default"] = bool(
                                 param_value
                             )
+                    elif config["parameters"][param_name]["type"] == "array":
+                        config["parameters"][param_name]["default"] = param_value
             else:
                 # Filling "with"
                 if not "with" in config:
@@ -989,6 +993,8 @@ def get_assembly(
                             config["parameters"][param_name]["default"] = bool(
                                 param_value
                             )
+                    elif config["parameters"][param_name]["type"] == "array":
+                        config["parameters"][param_name]["default"] = param_value
             else:
                 # Filling "with"
                 if not "with" in config:
@@ -1196,6 +1202,8 @@ def get_provider(
                             config["parameters"][param_name]["default"] = bool(
                                 param_value
                             )
+                    elif config["parameters"][param_name]["type"] == "array":
+                        config["parameters"][param_name]["default"] = param_value
             else:
                 # Filling "with"
                 if not "with" in config:
diff --git a/partcad/src/partcad/provider_config.py b/partcad/src/partcad/provider_config.py
index b10fcf7..282b9a1 100644
--- a/partcad/src/partcad/provider_config.py
+++ b/partcad/src/partcad/provider_config.py
@@ -46,6 +46,11 @@ def normalize(name, config):
                         "type": "bool",
                         "default": param_value,
                     }
+                elif isinstance(param_value, list):
+                    config["parameters"][param_name] = {
+                        "type": "array",
+                        "default": param_value,
+                    }
                 # All params are float unless another type is explicitly speciifed
                 elif (
                     isinstance(param_value, dict) and not "type" in param_value
diff --git a/partcad/src/partcad/sketch_config.py b/partcad/src/partcad/sketch_config.py
index 1372b0f..d5cefd7 100644
--- a/partcad/src/partcad/sketch_config.py
+++ b/partcad/src/partcad/sketch_config.py
@@ -43,6 +43,11 @@ def normalize(name, config):
                         "type": "bool",
                         "default": param_value,
                     }
+                elif isinstance(param_value, list):
+                    config["parameters"][param_name] = {
+                        "type": "array",
+                        "default": param_value,
+                    }
                 # All params are float unless another type is explicitly speciifed
                 elif (
                     isinstance(param_value, dict) and not "type" in param_value