diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index aef88fcbbf..eda1a759af 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -391,7 +391,7 @@ jobs:
                             PTEX_VERSION=v2.5.4
                             PUGIXML_VERSION=v1.16
                             WEBP_VERSION=v1.6.0
-                            FREETYPE_VERSION=VER-2-14-3
+                            FREETYPE_VERSION=VER-2-15-0
                             USE_OPENVDB=0
                             libuhdr_GIT_TAG=v2.0.2
                             libuhdr_GIT_COMMIT=e5f5a022fe96fc4dc2ee35c19f733a50df807abe
@@ -499,7 +499,7 @@ jobs:
                             PTEX_VERSION=v2.5.4
                             PUGIXML_VERSION=v1.16
                             WEBP_VERSION=v1.6.0
-                            FREETYPE_VERSION=VER-2-14-3
+                            FREETYPE_VERSION=VER-2-15-0
                             USE_OPENVDB=0
                             nanobind_GIT_TAG=v3.1.0
                             nanobind_GIT_COMMIT=68480a9e6883bb1bf65e1925423321e2a89d07f9
@@ -528,7 +528,7 @@ jobs:
                             PTEX_VERSION=v2.5.4
                             PUGIXML_VERSION=v1.16
                             WEBP_VERSION=v1.6.0
-                            FREETYPE_VERSION=VER-2-14-3
+                            FREETYPE_VERSION=VER-2-15-0
                             USE_OPENVDB=0
                             nanobind_GIT_TAG=v3.1.0
                             nanobind_GIT_COMMIT=68480a9e6883bb1bf65e1925423321e2a89d07f9
@@ -560,6 +560,7 @@ jobs:
             setenvs: export  CMAKE_VERSION=3.23.0
                              PTEX_VERSION=v2.3.2
                              WEBP_VERSION=v1.1.0
+                             FREETYPE_VERSION=VER-2-10-0
                              PUGIXML_VERSION=v1.11
                              PIP_SUFFIX=.9
                              PIP_INSTALLS=numpy
@@ -581,8 +582,8 @@ jobs:
             # Oldest clang and versions of the dependencies that we support.
             # Caveats: many optional deps (ffmpeg, TBB, OpenCV, giflib,
             # libheif, OpenJPEG, zlib, ...) are whatever Ubuntu 22.04 ships,
-            # not their minimums, libpng and libjpeg-turbo are not at their
-            # minimums.
+            # not their minimums, and libpng and libjpeg-turbo are not at
+            # their minimums.
             # Deliberately sets no `simd`, so that this job exercises the
             # default SIMD level for x86_64 (x86-64-v2). Please leave it unset.
             nametag: linux-oldest-clang-ubuntu
@@ -600,6 +601,7 @@ jobs:
             setenvs: export CMAKE_VERSION=3.23.0
                             PTEX_VERSION=v2.3.2
                             WEBP_VERSION=v1.1.0
+                            FREETYPE_VERSION=VER-2-10-0
                             PUGIXML_VERSION=v1.11
                             PIP_SUFFIX=.9
                             PIP_INSTALLS=numpy
diff --git a/INSTALL.md b/INSTALL.md
index f8022e898d..250edc1e70 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -38,7 +38,7 @@ NEW or CHANGED MINIMUM dependencies since the last major release are **bold**.
 ### Optional dependencies -- features may be disabled if not found
  * If you are building the `iv` viewer (which will be disabled if any of
    these are not found):
-     * Qt5 >= 5.6 (tested through 5.15) or Qt6 (tested through 6.11)
+     * Qt5 >= 5.6 (tested through 5.15) or Qt6 (tested through 6.12)
      * OpenGL
  * If you are building the Python bindings or running the testsuite:
      * Python >= 3.9 (tested through 3.14).
@@ -49,7 +49,7 @@ NEW or CHANGED MINIMUM dependencies since the last major release are **bold**.
      * [pybind11](https://github.com/pybind/pybind11) >= 2.7 (tested through
        3.1 and master), if you are building with `OIIO_PYTHON_BINDINGS_BACKEND` set to
        either `pybind11` or `both`.
-     * NumPy (tested through 2.5.3)
+     * NumPy (tested through 2.5.4)
  * If you want support for PNG files:
      * libPNG >= 1.6.0 (tested though 1.6.59 and master)
  * If you want support for camera "RAW" formats:
@@ -70,7 +70,7 @@ NEW or CHANGED MINIMUM dependencies since the last major release are **bold**.
      * giflib >= 5.0 (tested through 6.1.3)
  * If you want support for HEIF/HEIC or AVIF images:
      * libheif >= 1.11 (1.16 required for correct orientation support and
-       1.17 required for monochrome HEIC support; tested through 1.23.5)
+       1.17 required for monochrome HEIC support; tested through 1.23.6)
      * libheif must be built with an AV1 encoder/decoder for AVIF support.
  * If you want support for DICOM medical image files:
      * DCMTK >= 3.6.2 (tested through 3.7.0)
@@ -79,7 +79,7 @@ NEW or CHANGED MINIMUM dependencies since the last major release are **bold**.
  * If you want support for Ptex:
      * Ptex >= 2.3.1 (probably works for older; tested through 2.5 and main)
  * If you want to be able to do font rendering into images:
-     * Freetype >= 2.10.0 (tested through 2.14 and master)
+     * Freetype >= 2.10.0 (tested through 2.15 and master)
  * If you want to be able to read "ultra-HDR" embedded in JPEG files:
      * libultrahdr >= 1.3 (tested through 2.0.2 and main)
  * If you want support for JPEG XL images: