diff --git a/mozilla/webtools/bugzilla/.bzrrev b/mozilla/webtools/bugzilla/.bzrrev
index 16bd38e53bb..e4a2b1e7c36 100644
--- a/mozilla/webtools/bugzilla/.bzrrev
+++ b/mozilla/webtools/bugzilla/.bzrrev
@@ -1 +1 @@
-9042
\ No newline at end of file
+9043
\ No newline at end of file
diff --git a/mozilla/webtools/bugzilla/.gitrev b/mozilla/webtools/bugzilla/.gitrev
index 9a208aedfe2..1f4b29efab6 100644
--- a/mozilla/webtools/bugzilla/.gitrev
+++ b/mozilla/webtools/bugzilla/.gitrev
@@ -1 +1 @@
-f3a176d18144027a813ec60ce8811fe85083551e
\ No newline at end of file
+15b70d2e88e112a7764d8b2c90794b1860c4a234
\ No newline at end of file
diff --git a/mozilla/webtools/bugzilla/Bugzilla/Install/Requirements.pm b/mozilla/webtools/bugzilla/Bugzilla/Install/Requirements.pm
index f1071564dc0..d9e49017d1c 100644
--- a/mozilla/webtools/bugzilla/Bugzilla/Install/Requirements.pm
+++ b/mozilla/webtools/bugzilla/Bugzilla/Install/Requirements.pm
@@ -105,20 +105,18 @@ sub REQUIRED_MODULES {
         module  => 'Date::Format',
         version => '2.23'
     },
-    # 0.28 fixed some important bugs in DateTime.
+    # 0.75 fixes a warning thrown with Perl 5.17 and newer.
     {
         package => 'DateTime',
         module  => 'DateTime',
-        version => '0.28'
+        version => '0.75'
     },
-    # 0.79 is required to work on Windows Vista and Windows Server 2008.
-    # As correctly detecting the flavor of Windows is not easy,
-    # we require this version for all Windows installations.
-    # 0.71 fixes a major bug affecting all platforms.
+    # 1.64 fixes a taint issue preventing the local timezone from
+    # being determined on some systems.
     {
         package => 'DateTime-TimeZone',
         module  => 'DateTime::TimeZone',
-        version => ON_WINDOWS ? '0.79' : '0.71'
+        version => '1.64'
     },
     # 1.54 is required for Perl 5.10+. It also makes DBD::Oracle happy.
     {