diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4ae4f3714..310108df9 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.5)
+cmake_minimum_required(VERSION 3.15)
 
 list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_LIST_DIR}/cmake")
 
diff --git a/README.rst b/README.rst
index 9e115010e..a55ba0ab3 100644
--- a/README.rst
+++ b/README.rst
@@ -123,7 +123,7 @@ Dependencies
 Compiling fish requires:
 
 -  Rust (version 1.70 or later)
--  CMake (version 3.5 or later)
+-  CMake (version 3.15 or later)
 -  a C compiler (for system feature detection and the test helper binary)
 -  PCRE2 (headers and libraries) - optional, this will be downloaded if missing
 -  gettext (headers and libraries) - optional, for translation support
diff --git a/debian/control b/debian/control
index 6dd45365d..063ef2927 100644
--- a/debian/control
+++ b/debian/control
@@ -5,7 +5,7 @@ Maintainer: ridiculous_fish <corydoras@ridiculousfish.com>
 Uploaders: David Adam <zanchey@ucc.gu.uwa.edu.au>
 Build-Depends: debhelper (>= 12),
  cargo (>= 0.66) | cargo-mozilla (>= 0.66),
- cmake (>= 3.19.0) | cmake-mozilla (>= 3.19.0),
+ cmake (>= 3.15.0) | cmake-mozilla (>= 3.15.0),
  gettext,
  libpcre2-dev,
  rustc (>= 1.70),
diff --git a/fish.spec.in b/fish.spec.in
index 6c262ac9d..a74487df0 100644
--- a/fish.spec.in
+++ b/fish.spec.in
@@ -14,7 +14,7 @@ BuildRequires:          cargo gettext gcc xz pcre2-devel
 BuildRequires:          rust >= 1.70
 # Packaging guidelines say to use a BuildRequires: rust-packaging, but it adds no value for our package
 
-BuildRequires: cmake >= 3.19
+BuildRequires: cmake >= 3.15
 
 %if 0%{?suse_version}
 BuildRequires: update-desktop-files