diff --git a/xfel_calibrate/calibrate.py b/xfel_calibrate/calibrate.py
index 99daadfd82036d391a38907d33629a891a4e8475..9ca0315a27f3b4a2cfe8ba6c70cbd5d9cae9d193 100755
--- a/xfel_calibrate/calibrate.py
+++ b/xfel_calibrate/calibrate.py
@@ -149,7 +149,7 @@ def extract_title_author_version(nb):
 
     first_md = first_markdown_cell(nb)
     source = first_md["source"]
-    title = re.findall(r'\#+\s*(.*)\s*\#+', source)
+    title = re.findall(r'#+\s*(.*)\s*#+', source)
     author = re.findall(
         r'author[\s]*[:][\s]*(.*?)\s*(?:[,?]|version)', source, flags=re.IGNORECASE)