diff --git a/cwms/api.py b/cwms/api.py
index 1dba6bee..17267ffb 100644
--- a/cwms/api.py
+++ b/cwms/api.py
@@ -309,7 +309,7 @@ def post(
     # post requires different headers than get for
     headers = {"accept": "*/*", "Content-Type": api_version_text(api_version)}
 
-    if isinstance(data, dict):
+    if isinstance(data, dict) or isinstance(data, list):
         data = json.dumps(data)
 
     response = SESSION.post(endpoint, params=params, headers=headers, data=data)
@@ -349,7 +349,7 @@ def patch(
     if data is None:
         response = SESSION.patch(endpoint, params=params, headers=headers)
     else:
-        if isinstance(data, dict):
+        if isinstance(data, dict) or isinstance(data, list):
             data = json.dumps(data)
         response = SESSION.patch(endpoint, params=params, headers=headers, data=data)
     response.close()
diff --git a/pyproject.toml b/pyproject.toml
index 6119bd69..3a05ca7a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,7 +1,7 @@
 [tool.poetry]
 name = "cwms-python"
 
-version = "0.5.5"
+version = "0.5.6"
 
 packages = [
     { include = "cwms" },