diff --git a/doc/manual/src/installation/prerequisites-source.md b/doc/manual/src/installation/prerequisites-source.md
index 5a708f11b..d4babf1ea 100644
--- a/doc/manual/src/installation/prerequisites-source.md
+++ b/doc/manual/src/installation/prerequisites-source.md
@@ -10,7 +10,7 @@
   - Bash Shell. The `./configure` script relies on bashisms, so Bash is
     required.
 
-  - A version of GCC or Clang that supports C++17.
+  - A version of GCC or Clang that supports C++20.
 
   - `pkg-config` to locate dependencies. If your distribution does not
     provide it, you can get it from