diff --git a/src/igitar/constants.py b/src/igitar/constants.py
index 5a02ded..d279832 100644
--- a/src/igitar/constants.py
+++ b/src/igitar/constants.py
@@ -34,7 +34,7 @@ DIRECTIVE = re.compile(r'\{(' + '|'.join([d for t in KNOWN_DIRECTIVES for d in t
 START_OF = re.compile(r'\{start_of_(' + '|'.join(KNOWN_VERSE_TYPES) + r')(: *(.*?))?\}')
 END_OF = re.compile(r'\{end_of_(' + '|'.join(KNOWN_VERSE_TYPES) + r')\}')
 CHORUS_MARKER = re.compile(r'\{chorus(: *(.*?))?\}')
-VERSE_MARKER = re.compile(r'\{verse: *(.*?)\}')
-BRIDGE_MARKER = re.compile(r'\{bridge: *(.*?)\}')
+VERSE_MARKER = re.compile(r'\{verse(: *(.*?))?\}')
+BRIDGE_MARKER = re.compile(r'\{bridge(: *(.*?))?\}')
 CHORD_WORD = re.compile(r'(.*?)\[(.*?)\]')
 CHORD = re.compile(r'\[(.*?)\]')