diff --git a/scripts/webui_streamlit.py b/scripts/webui_streamlit.py
index 13eeae1..44a76e6 100644
--- a/scripts/webui_streamlit.py
+++ b/scripts/webui_streamlit.py
@@ -450,9 +450,9 @@ prompt_parser = re.compile("""
     (?:                        # non-capture group
     :+                         # match one or more ':' characters  
     (?P<weight>                # capture group for 'weight'
-    -?\d+(?:\.\d+)?            # match positive or negative decimal number
+    -?\\d+(?:\\.\\d+)?            # match positive or negative decimal number
     )?                         # end weight capture group, make optional 
-    \s*                        # strip spaces after weight
+    \\s*                        # strip spaces after weight
     |                          # OR
     $                          # else, if no ':' then match end of line
     )                          # end non-capture group