diff --git a/INSTALL b/INSTALL
index 61811cc3d7..b7dc910753 100644
--- a/INSTALL
+++ b/INSTALL
@@ -53,8 +53,7 @@ Requirements
 ------------
 
 First of all, you will need a C++17 standard conforming compiler, like
-g++ (at least 5.0, to have proper std::regex & std::string) or
-clang++.
+g++ (we suggest at least version 8.0) or clang++.
 
 LyX makes great use of the C++ Standard Library. This means that gcc
 users will have to install the relevant libstdc++ library to be able
diff --git a/README b/README
index 1df823f869..fabdbac136 100644
--- a/README
+++ b/README
@@ -88,7 +88,7 @@ What do I need to compile LyX from the source distribution?
 
     * A C++11 compiler. Development is being done mainly with gcc/g++,
       but clang and MSVC are known to work too. As of LyX 2.5.0, you
-      need at least gcc 5.0.
+      need at least gcc 8.0.
 
     * The Qt library, at least version 5.2 (5.6 recommended). It is
       also possible to compile with Qt 6.x.