diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 70df4085e0..6f6b47668f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -256,7 +256,7 @@ jobs:
             cxx_compiler: g++-11
             cxx_std: 17
             fmt_ver: 9.1.0
-            openexr_ver: v3.1.10
+            openexr_ver: v3.1.11
             pybind11_ver: v2.11.1
             python_ver: "3.10"
             simd: avx2,f16c
@@ -297,7 +297,7 @@ jobs:
             cc_compiler: clang
             cxx_std: 20
             fmt_ver: 9.0.0
-            openexr_ver: v3.1.10
+            openexr_ver: v3.1.11
             pybind11_ver: v2.9.2
             python_ver: 3.8
             simd: avx2,f16c
diff --git a/INSTALL.md b/INSTALL.md
index f1a12f0743..416ca1c1b1 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -17,6 +17,7 @@ NEW or CHANGED MINIMUM dependencies since the last major release are **bold**.
  * C++14 or higher (also builds with C++17, and C++20)
      * The default build mode is C++14. This can be controlled by via the
        CMake configuration flag: `-DCMAKE_CXX_STANDARD=17`, etc.
+     * ADVISORY: We expect that OIIO 2.6 in 2024 will require C++17 or higher.
  * Compilers: gcc 6.1 - 12.1, clang 3.4 - 16, MSVS 2017 - 2019,
    Intel icc 17+, Intel OneAPI C++ compiler 2022+.
  * **CMake >= 3.15** (tested through 3.27)