diff --git a/bindings/python/wscript b/bindings/python/wscript
index 1b088555d..a9994e058 100644
--- a/bindings/python/wscript
+++ b/bindings/python/wscript
@@ -18,9 +18,9 @@ from waflib.Errors import WafError
 # version as, e.g. '0.21.0'
 # If specifying a commit on the development tree, specify it like this based
 # on 'git describe --tags' command.  Example, if the latest release was 0.21.0,
-# and 'git decribe --tags' reports "0.21.0-6-g8e7c0a9", then write the
+# and 'git describe --tags' reports "0.21.0-6-g8e7c0a9", then write the
 # PYBINDGEN version string below as '0.21.0.post6+ng8e7c0a9'
-REQUIRED_PYBINDGEN_VERSION = '0.21.0.post15+nga587377'
+REQUIRED_PYBINDGEN_VERSION = '0.21.0.post20+ng71852b1'
 REQUIRED_PYGCCXML_VERSION = (2, 0, 1)
 REQUIRED_CASTXML_VERSION = '0.2'