diff --git a/streamlit_pdf_viewer/__init__.py b/streamlit_pdf_viewer/__init__.py
index 300793c4..f477ff73 100644
--- a/streamlit_pdf_viewer/__init__.py
+++ b/streamlit_pdf_viewer/__init__.py
@@ -22,8 +22,11 @@
     )
 
 
-def pdf_viewer(input: Union[str, Path, bytes], width: int = 700, height: int = None, key=None, annotations=[],
-               page_margin=2, annotation_outline_size=1):
+def pdf_viewer(input: Union[str, Path, bytes], width: int = 700, height: int = None, key=None,
+               annotations=(),
+               pages_vertical_spacing=2,
+               annotation_outline_size=1
+               ):
     """
     pdf_viewer function to display a PDF file in a Streamlit app.
 
@@ -32,10 +35,8 @@ def pdf_viewer(input: Union[str, Path, bytes], width: int = 700, height: int = N
     :param height: Height of the PDF viewer in pixels. If not provided, the viewer show the whole content.
     :param key: An optional key that uniquely identifies this component. Used to preserve state in Streamlit apps.
     :param annotations: A list of annotations to be overlaid on the PDF. Each annotation should be a dictionary.
-    :param page_margin: The margin (in pixels) between each page of the PDF. It adjusts the spacing between pages.
-                        Defaults to 2 pixels.
-    :param annotation_outline_size: Size of the outline around each annotation in pixels.
-                        Defaults to 1 pixel.
+    :param pages_vertical_spacing: The vertical space (in pixels) between each page of the PDF. Defaults to 2 pixels.
+    :param annotation_outline_size: Size of the outline around each annotation in pixels. Defaults to 1 pixel.
 
     The function reads the PDF file (from a file path, URL, or binary data), encodes it in base64,
     and uses a Streamlit component to render it in the app. It supports optional annotations and adjustable margins.
@@ -57,7 +58,7 @@ def pdf_viewer(input: Union[str, Path, bytes], width: int = 700, height: int = N
 
     base64_pdf = base64.b64encode(binary).decode('utf-8')
     component_value = _component_func(binary=base64_pdf, width=width, height=height, key=key, default=0,
-                                      annotations=annotations, page_margin=page_margin,
+                                      annotations=annotations, pages_vertical_spacing=pages_vertical_spacing,
                                       annotation_outline_size=annotation_outline_size)
     return component_value
 
diff --git a/streamlit_pdf_viewer/frontend/src/PdfViewer.vue b/streamlit_pdf_viewer/frontend/src/PdfViewer.vue
index ce89208a..bbad3871 100644
--- a/streamlit_pdf_viewer/frontend/src/PdfViewer.vue
+++ b/streamlit_pdf_viewer/frontend/src/PdfViewer.vue
@@ -40,7 +40,7 @@ export default {
       const pageIndex = page - 1;
       let height = 0;
       for (let i = 0; i < pageIndex; i++) {
-        height += Math.floor(pageHeights.value[i] * pageScales.value[i]) + props.args.page_margin; // Add margin for each page
+        height += Math.floor(pageHeights.value[i] * pageScales.value[i]) + props.args.pages_vertical_spacing; // Add margin for each page
       }
       return height;
     };
@@ -73,7 +73,7 @@ export default {
       canvas.height = viewport.height;
       canvas.width = viewport.width;
       canvas.style.display = "block";
-      canvas.style.marginBottom = `${props.args.page_margin}px`;
+      canvas.style.marginBottom = `${props.args.pages_vertical_spacing}px`;
       return canvas;
     };
 
@@ -103,11 +103,11 @@ export default {
           maxWidth.value = canvas.width;
         }
         totalHeight.value += canvas.height;
-        totalHeight.value += props.args.page_margin;
+        totalHeight.value += props.args.pages_vertical_spacing;
         await renderPage(page, canvas);
       }
       // Subtract the margin for the last page as it's not needed
-      totalHeight.value -= props.args.page_margin;
+      totalHeight.value -= props.args.pages_vertical_spacing;
     };