diff --git a/pyscriptjs/src/interpreter.ts b/pyscriptjs/src/interpreter.ts
index c373be4..ceab6ab 100644
--- a/pyscriptjs/src/interpreter.ts
+++ b/pyscriptjs/src/interpreter.ts
@@ -68,6 +68,8 @@ def format_mime(obj):
     """
     Formats object using _repr_x_ methods.
     """
+    if isinstance(obj, str):
+        return obj, 'text/plain'
 
     mimebundle = eval_formatter(obj, '_repr_mimebundle_')
     if isinstance(mimebundle, tuple):
diff --git a/pyscriptjs/src/pyscript.py b/pyscriptjs/src/pyscript.py
index 8415b4c..300326e 100644
--- a/pyscriptjs/src/pyscript.py
+++ b/pyscriptjs/src/pyscript.py
@@ -59,6 +59,8 @@ def format_mime(obj):
     """
     Formats object using _repr_x_ methods.
     """
+    if isinstance(obj, str):
+        return obj, 'text/plain'
 
     mimebundle = eval_formatter(obj, '_repr_mimebundle_')
     if isinstance(mimebundle, tuple):