diff --git a/java-17-openjdk.spec b/java-17-openjdk.spec
index 29f1192..67ea09a 100644
--- a/java-17-openjdk.spec
+++ b/java-17-openjdk.spec
@@ -1137,8 +1137,8 @@ Requires: ca-certificates
 # Require javapackages-filesystem for ownership of /usr/lib/jvm/ and macros
 Requires: javapackages-filesystem
 # Require zone-info data provided by tzdata-java sub-package
-# 2026a required as of JDK-8379035
-Requires: tzdata-java >= 2026a
+# 2026b required as of JDK-8383175
+Requires: tzdata-java >= 2026b
 # for support of kernel stream control
 # libsctp.so.1 is being `dlopen`ed on demand
 Requires: lksctp-tools%{?_isa}
@@ -1470,8 +1470,8 @@ BuildRequires: java-%{featurever}-openjdk-portable-misc = %{epoch}:%{version}-%{
 %ifarch %{zero_arches}
 BuildRequires: libffi-devel
 %endif
-# 2026a required as of JDK-8379035
-BuildRequires: tzdata-java >= 2026a
+# 2026b required as of JDK-8383175
+BuildRequires: tzdata-java >= 2026b
 # Earlier versions have a bug in tree vectorization on PPC
 BuildRequires: gcc >= 4.8.3-8
 
@@ -2512,6 +2512,9 @@ cjc.mainProgram(args)
 %endif
 
 %changelog
+* Mon Jul 13 2026 Thomas Fitzsimmons <fitzsim@redhat.com> - 1:17.0.20.0.8-1.1
+- Set tzdata requires and build requires to 2026b
+
 * Mon Jul 13 2026 Andrew Hughes <gnu.andrew@redhat.com> - 1:17.0.20.0.8-1.1
 - Specify portablerelease and rpmrelease (always 0 for portables) in the Release field (OPENJDK-4876)