diff --git a/foundational-cxx-support-matrix.md b/foundational-cxx-support-matrix.md
index 0618362..55b8cbd 100644
--- a/foundational-cxx-support-matrix.md
+++ b/foundational-cxx-support-matrix.md
@@ -5,7 +5,7 @@
 | C++ Version     | >= 14                  | 2022-07-01   | 2024-12-15  |
 | CMake           | >= 3.13                | 2023-06-01   | 2024-07-01 [^cmake] |
 | Bazel           | 6 LTS                  | 2023-04-18   | 2024-11-01  |
-| GCC             | >= 7.3.1               | 2022-07-01   | 2024-07-01 [^gcc] |
+| GCC             | >= 7.5.0               | 2024-07-01   | 2026-01-01 [^gcc] |
 | Clang           | >= 7.0.0               | 2023-06-01   | 2025-04-02 [^clang] |
 | MSVC            | >= 2022                | 2024-04-29   | 2027-01-12  |
 | Apple Clang     | >= 12                  | 2022-07-01   | |
@@ -15,9 +15,8 @@
 | Fedora          | >= 39                  | 2024-01-02   | 2024-12-01 |
 | openSUSE        | >= Leap 15.5           | 2024-01-02   | 2025-01-01 |
 | Ubuntu LTS      | >= 20.04               | 2023-06-01   | 2025-04-02 |
-| RHEL            | >= 7 [^rhel-7]         | 2022-07-01   | 2024-07-01 |
-| CentOS          | 7 [^rhel-7]            | 2022-07-01   | 2024-07-01 |
-| RockyLinux      | 8                      | 2022-07-01   | 2024-06-01 |
+| RHEL            | >= 9                   | 2024-07-01   | 2027-06-01 |
+| RockyLinux      | >= 9                   | 2024-07-01   | 2027-06-01 |
 | Windows Server  | >= 2022                | 2024-01-22   | 2026-10-13 |
 | Windows Client  | >= 10                  | 2022-07-01   | 2025-11-01 |
 | macOS           | >= 10.15 (Catalina)    | 2024-01-24   | 2024-07-01 |
@@ -27,15 +26,12 @@
 vendor (or community, as applicable) extends or shortens the lifetime of the
 dimension in question.
 
-[^rhel-7]: We require the [devtoolset-7] toolchain (compiler, linker, build
-tools, etc.) on RHEL 7 and CentOS 7.
-
 [^cmake]: We support the oldest version of CMake that ships with one of the
 supported distros. Currently that is CMake 3.13 as Debian 10 ships with this
 version.
 
-[^gcc]: Once RHEL 7 reaches EOL we will support the oldest version of GCC
-that ships with one of the supported distros.
+[^gcc]: Once openSUSE/Leap 15.5 reaches EOL we will support the oldest
+version of GCC that ships with one of the supported distros.
 
 [^clang]: We support the oldest version of Clang that ships with one of the
 supported distros. Currently that is Clang 7.0 as Ubuntu 20.04 ships with