diff --git a/parea/utils/trace_utils.py b/parea/utils/trace_utils.py
index ea467388..17193f43 100644
--- a/parea/utils/trace_utils.py
+++ b/parea/utils/trace_utils.py
@@ -70,6 +70,12 @@ def init_trace(func_name, args, kwargs, func) -> tuple[str, float]:
 
         inputs = {k: v for k, v in zip(parameters.keys(), args)}
         inputs.update(kwargs)
+        # filter out any values which aren't JSON serializable
+        for k, v in inputs.items():
+            try:
+                json.dumps(v)
+            except TypeError:
+                inputs[k] = str(v)
 
         trace_data.get()[trace_id] = TraceLog(
             trace_id=trace_id,
diff --git a/pyproject.toml b/pyproject.toml
index f4e9f158..fe2e17d4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -6,7 +6,7 @@ build-backend = "poetry.core.masonry.api"
 [tool.poetry]
 name = "parea-ai"
 packages = [{ include = "parea" }]
-version = "0.2.27"
+version = "0.2.28"
 description = "Parea python sdk"
 readme = "README.md"
 authors = ["joel-parea-ai <joel@parea.ai>"]