diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6f6b47668f..6b9f83a5c0 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -249,20 +249,20 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - desc: latest releases gcc11 C++17 avx2 exr3.1 ocio2.2
+          - desc: latest releases gcc11 C++17 avx2 exr3.2 ocio2.3
             nametag: linux-latest-releases
             os: ubuntu-22.04
             cc_compiler: gcc-11
             cxx_compiler: g++-11
             cxx_std: 17
             fmt_ver: 9.1.0
-            openexr_ver: v3.1.11
+            openexr_ver: v3.2.0
             pybind11_ver: v2.11.1
             python_ver: "3.10"
             simd: avx2,f16c
             setenvs: export LIBRAW_VERSION=0.20.2
                             LIBTIFF_VERSION=v4.5.0
-                            OPENCOLORIO_VERSION=v2.2.0
+                            OPENCOLORIO_VERSION=v2.3.0
                             OPENJPEG_VERSION=v2.4.0
                             PTEX_VERSION=v2.4.0
                             PUGIXML_VERSION=v1.13
diff --git a/INSTALL.md b/INSTALL.md
index 416ca1c1b1..2ef6882c8b 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -68,7 +68,7 @@ NEW or CHANGED MINIMUM dependencies since the last major release are **bold**.
  * If you want support for WebP images:
      * WebP >= 0.6.1 (tested through 1.3.1)
  * If you want support for OpenColorIO color transformations:
-     * OpenColorIO >= 1.1 (tested through 2.2; 2.0+ is recommended)
+     * OpenColorIO >= 1.1 (tested through 2.3; 2.0+ is recommended)
  * If you want support for Ptex:
      * Ptex >= 2.3.1 (probably works for older; tested through 2.4.2)
  * If you want to be able to do font rendering into images:
diff --git a/testsuite/python-colorconfig/ref/out-ocio23.txt b/testsuite/python-colorconfig/ref/out-ocio23.txt
new file mode 100644
index 0000000000..ce01af5931
--- /dev/null
+++ b/testsuite/python-colorconfig/ref/out-ocio23.txt
@@ -0,0 +1,30 @@
+getNumColorSpaces = 15
+getColorSpaceNames = ['ACES2065-1', 'ACEScc', 'ACEScct', 'ACEScg', 'Linear P3-D65', 'Linear Rec.2020', 'Linear Rec.709 (sRGB)', 'Gamma 1.8 Rec.709 - Texture', 'Gamma 2.2 AP1 - Texture', 'Gamma 2.2 Rec.709 - Texture', 'Gamma 2.4 Rec.709 - Texture', 'sRGB Encoded AP1 - Texture', 'sRGB Encoded P3-D65 - Texture', 'sRGB - Texture', 'Raw']
+Index of 'lin_srgb' = 6
+Index of 'unknown' = -1
+Name of color space 2 = ACEScct
+getNumLooks = 1
+getLookNames = ['ACES 1.3 Reference Gamut Compression']
+getNumDisplays = 6
+getDisplayNames = ['sRGB - Display', 'Display P3 - Display', 'Rec.1886 Rec.709 - Display', 'Rec.2100-PQ - Display', 'ST2084-P3-D65 - Display', 'P3-D65 - Display']
+getDefaultDisplayName = sRGB - Display
+getNumViews = 3
+getViewNames = ['ACES 1.0 - SDR Video', 'Un-tone-mapped', 'Raw']
+getDefaultViewName = ACES 1.0 - SDR Video
+getNumRoles = 9
+getRoles = ['aces_interchange', 'cie_xyz_d65_interchange', 'color_picking', 'color_timing', 'compositing_log', 'data', 'matte_paint', 'scene_linear', 'texture_paint']
+aliases of 'scene_linear' are ['ACES - ACEScg', 'lin_ap1']
+resolve('foo'): foo
+resolve('linear'): ACEScg
+resolve('scene_linear'): ACEScg
+resolve('lin_srgb'): Linear Rec.709 (sRGB)
+resolve('srgb'): sRGB - Texture
+resolve('ACEScg'): ACEScg
+equivalent('lin_srgb', 'srgb'): False
+equivalent('scene_linear', 'srgb'): False
+equivalent('linear', 'lin_srgb'): False
+equivalent('scene_linear', 'lin_srgb'): False
+equivalent('ACEScg', 'scene_linear'): True
+equivalent('lnf', 'scene_linear'): False
+
+Done.