diff --git a/src/vendor/cigraph/CHANGELOG.md b/src/vendor/cigraph/CHANGELOG.md
index 20115b032d..cf286420ba 100644
--- a/src/vendor/cigraph/CHANGELOG.md
+++ b/src/vendor/cigraph/CHANGELOG.md
@@ -4,6 +4,7 @@
 
 ### Other
 
+ - Workaround for bug in CMake 3.31.0, see https://gitlab.kitware.com/cmake/cmake/-/issues/26449
  - Documentation improvements.
 
 ## [0.10.15]
diff --git a/src/vendor/cigraph/CMakeLists.txt b/src/vendor/cigraph/CMakeLists.txt
index d5b65075a9..09b82ebef9 100644
--- a/src/vendor/cigraph/CMakeLists.txt
+++ b/src/vendor/cigraph/CMakeLists.txt
@@ -7,12 +7,10 @@
 #  * cmake -E cat (3.18)
 cmake_minimum_required(VERSION 3.18...3.31)
 
-# TODO:
 # CMake 3.31.0 issues warnings due to the following bug:
 # https://gitlab.kitware.com/cmake/cmake/-/issues/26449
-# Setting policy CMP0175 to OLD avoids the warnings. Remove this or restrict to
-# affected CMake versions when the bug is fixed.
-if(POLICY CMP0175)
+# Setting policy CMP0175 to OLD avoids the warnings.
+if(CMAKE_VERSION VERSION_EQUAL "3.31.0")
   cmake_policy(SET CMP0175 OLD)
 endif()
 
diff --git a/src/vendor/igraph_version.h b/src/vendor/igraph_version.h
index 26a93c0e28..f2eea54fd3 100644
--- a/src/vendor/igraph_version.h
+++ b/src/vendor/igraph_version.h
@@ -28,11 +28,11 @@
 
 __BEGIN_DECLS
 
-#define IGRAPH_VERSION "0.10.15-17-g5e734a2c1"
+#define IGRAPH_VERSION "0.10.15-18-g833672f02"
 #define IGRAPH_VERSION_MAJOR 0
 #define IGRAPH_VERSION_MINOR 10
 #define IGRAPH_VERSION_PATCH 15
-#define IGRAPH_VERSION_PRERELEASE "17-g5e734a2c1"
+#define IGRAPH_VERSION_PRERELEASE "18-g833672f02"
 
 IGRAPH_EXPORT void igraph_version(const char **version_string,
                                   int *major,