diff --git a/INSTALL.md b/INSTALL.md
index e6f807ff8a..fc79f86879 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -19,7 +19,7 @@ NEW or CHANGED MINIMUM dependencies since the last major release are **bold**.
        CMake configuration flag: `-DCMAKE_CXX_STANDARD=20`, etc.
  * Compilers: **gcc 9.3** - 14.2, **clang 5** - 19, MSVS 2017 - 2019 (**v19.14
    and up**), **Intel icc 19+**, Intel OneAPI C++ compiler 2022+.
- * **CMake >= 3.18.2** (tested through 3.30)
+ * **CMake >= 3.18.2** (tested through 3.31)
  * **Imath >= 3.1** (tested through 3.1.x and main)
  * **OpenEXR >= 3.1** (tested through 3.3 and main)
  * **libTIFF >= 4.0** (tested through 4.7)
diff --git a/src/build-scripts/build_cmake.bash b/src/build-scripts/build_cmake.bash
index 5f20ba1a1c..0a74413b2d 100755
--- a/src/build-scripts/build_cmake.bash
+++ b/src/build-scripts/build_cmake.bash
@@ -12,7 +12,7 @@ set -ex
 echo "Building cmake"
 uname
 
-CMAKE_VERSION=${CMAKE_VERSION:=3.18.5}
+CMAKE_VERSION=${CMAKE_VERSION:=3.31.3}
 LOCAL_DEPS_DIR=${LOCAL_DEPS_DIR:=${PWD}/ext}
 CMAKE_INSTALL_DIR=${CMAKE_INSTALL_DIR:=${LOCAL_DEPS_DIR}/cmake}
 
@@ -25,8 +25,8 @@ fi
 
 if [[ `uname` == "Linux" && `uname -m` == "aarch64" ]] ; then
     mkdir -p ${CMAKE_INSTALL_DIR} || true
-    curl --location https://anaconda.org/conda-forge/cmake/3.17.0/download/linux-aarch64/cmake-3.17.0-h28c56e5_0.tar.bz2 -o cmake-3.17.0-h28c56e5_0.tar.bz2
-    tar -xjf cmake-3.17.0-h28c56e5_0.tar.bz2 -C ${CMAKE_INSTALL_DIR}
+    curl --location "https://github.com/Kitware/CMake/releases/download/v${CMAKE_VERSION}/cmake-${CMAKE_VERSION}-Linux-aarch64.sh" -o "cmake.sh"
+    sh cmake.sh --skip-license --prefix=${CMAKE_INSTALL_DIR}
     export PATH=${CMAKE_INSTALL_DIR}/bin:$PATH
 
     # In case we ever need to build from scratch: