diff --git a/pyzebra/app/panel_ccl_integrate.py b/pyzebra/app/panel_ccl_integrate.py
index e7e2044..e3ea304 100644
--- a/pyzebra/app/panel_ccl_integrate.py
+++ b/pyzebra/app/panel_ccl_integrate.py
@@ -457,7 +457,7 @@ def create():
 
             preview_output_textinput.value = exported_content
 
-    preview_output_button = Button(label="Preview file", default_size=200)
+    preview_output_button = Button(label="Preview file", default_size=200, disabled=True)
     preview_output_button.on_click(preview_output_button_callback)
 
     hkl_precision_select = Select(
@@ -489,7 +489,9 @@ def create():
                     cont = ""
                 js_data[ext].data.update(cont=[cont], ext=[ext])
 
-    save_button = Button(label="Download file", button_type="success", default_size=200)
+    save_button = Button(
+        label="Download file", button_type="success", default_size=200, disabled=True
+    )
     save_button.on_click(save_button_callback)
     save_button.js_on_click(CustomJS(args={"js_data": js_data[".comm"]}, code=javaScript))
     save_button.js_on_click(CustomJS(args={"js_data": js_data[".incomm"]}, code=javaScript))
diff --git a/pyzebra/app/panel_param_study.py b/pyzebra/app/panel_param_study.py
index 93aa428..1d8dbb9 100644
--- a/pyzebra/app/panel_param_study.py
+++ b/pyzebra/app/panel_param_study.py
@@ -535,7 +535,7 @@ def create():
 
             preview_output_textinput.value = exported_content
 
-    preview_output_button = Button(label="Preview file", default_size=220)
+    preview_output_button = Button(label="Preview file", default_size=220, disabled=True)
     preview_output_button.on_click(preview_output_button_callback)
 
     def save_button_callback():
@@ -563,7 +563,9 @@ def create():
                     cont = ""
                 js_data[ext].data.update(cont=[cont], ext=[ext])
 
-    save_button = Button(label="Download file", button_type="success", default_size=220)
+    save_button = Button(
+        label="Download file", button_type="success", default_size=220, disabled=True
+    )
     save_button.on_click(save_button_callback)
     save_button.js_on_click(CustomJS(args={"js_data": js_data[".comm"]}, code=javaScript))
     save_button.js_on_click(CustomJS(args={"js_data": js_data[".incomm"]}, code=javaScript))