diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9f6b363..c35a4e0 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.9)
+cmake_minimum_required(VERSION 3.11)
 
 project(
 	opustags
diff --git a/README.md b/README.md
index 1252bac..1c9181c 100644
--- a/README.md
+++ b/README.md
@@ -22,7 +22,7 @@ Requirements
 
 * a POSIX-compliant system,
 * a C++17 compiler,
-* CMake ≥ 3.9,
+* CMake ≥ 3.11,
 * libogg 1.3.3.
 
 The version numbers are indicative, and it's very likely opustags will build and work fine with