diff --git a/mail/thunderbird/Makefile b/mail/thunderbird/Makefile
index a09d5b11f7b83..164cac332b43a 100644
--- a/mail/thunderbird/Makefile
+++ b/mail/thunderbird/Makefile
@@ -1,5 +1,5 @@
 PORTNAME=	thunderbird
-DISTVERSION=	115.4.3
+DISTVERSION=	115.5.0
 CATEGORIES=	mail news net-im wayland
 MASTER_SITES=	MOZILLA/${PORTNAME}/releases/${DISTVERSION}/source \
 		MOZILLA/${PORTNAME}/candidates/${DISTVERSION}-candidates/build1/source
@@ -29,7 +29,7 @@ LIB_DEPENDS=	libjson-c.so:devel/json-c \
 SSP_UNSAFE=	yes
 USE_GECKO=	gecko
 # cannot use system icu: calendar is completely broken by
-# https://unicode-org.atlassian.net/browse/ICU-22132 (fix ETA 74.1)
+# https://unicode-org.atlassian.net/browse/ICU-22132 (fix not in 74.1)
 USE_MOZILLA=	-icu -sqlite
 CFLAGS_powerpc64le=	-DSQLITE_BYTEORDER=1234
 
diff --git a/mail/thunderbird/distinfo b/mail/thunderbird/distinfo
index f582e6bf925a6..eade2b34d7a31 100644
--- a/mail/thunderbird/distinfo
+++ b/mail/thunderbird/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1699918906
-SHA256 (thunderbird-115.4.3.source.tar.xz) = bf21b245b4451f402e48fc95ff72e72b91689cdbe98ec1d0fa3fac34e9abfc09
-SIZE (thunderbird-115.4.3.source.tar.xz) = 533328212
+TIMESTAMP = 1700594359
+SHA256 (thunderbird-115.5.0.source.tar.xz) = dc24886b2d2223d23141dbfb29855c0254de2603bd829d4cbc7dc4ea2ac711fa
+SIZE (thunderbird-115.5.0.source.tar.xz) = 535406304