diff --git a/pyscriptjs/src/interpreter.ts b/pyscriptjs/src/interpreter.ts
index 5c1f7ab..d3f774b 100644
--- a/pyscriptjs/src/interpreter.ts
+++ b/pyscriptjs/src/interpreter.ts
@@ -20,7 +20,7 @@ MIME_METHODS = {
     '_repr_markdown_': 'text/markdown',
     '_repr_svg_': 'image/svg+xml',
     '_repr_png_': 'image/png',
-    'repr_pdf_': 'application/pdf',
+    '_repr_pdf_': 'application/pdf',
     '_repr_jpeg_': 'image/jpeg',
     '_repr_latex': 'text/latex',
     '_repr_json_': 'application/json',
diff --git a/pyscriptjs/src/pyscript.py b/pyscriptjs/src/pyscript.py
index 6bafd0f..1f66b26 100644
--- a/pyscriptjs/src/pyscript.py
+++ b/pyscriptjs/src/pyscript.py
@@ -11,7 +11,7 @@ MIME_METHODS = {
     '_repr_markdown_': 'text/markdown',
     '_repr_svg_': 'image/svg+xml',
     '_repr_png_': 'image/png',
-    'repr_pdf_': 'application/pdf',
+    '_repr_pdf_': 'application/pdf',
     '_repr_jpeg_': 'image/jpeg',
     '_repr_latex': 'text/latex',
     '_repr_json_': 'application/json',