diff --git a/CMake/curl-config.in.cmake b/CMake/curl-config.in.cmake
index b4300ca210..4bfac08e3a 100644
--- a/CMake/curl-config.in.cmake
+++ b/CMake/curl-config.in.cmake
@@ -30,7 +30,7 @@ option(CURL_USE_PKGCONFIG "Enable pkg-config to detect @PROJECT_NAME@ dependenci
 
 if(CMAKE_VERSION VERSION_LESS @CMAKE_MINIMUM_REQUIRED_VERSION@)
   message(STATUS "@PROJECT_NAME@: @PROJECT_NAME@-specific Find modules require "
-    "CMake @CMAKE_MINIMUM_REQUIRED_VERSION@ or upper, found: ${CMAKE_VERSION}.")
+    "CMake @CMAKE_MINIMUM_REQUIRED_VERSION@ or higher, found: ${CMAKE_VERSION}.")
 endif()
 
 include(CMakeFindDependencyMacro)
diff --git a/CMakeLists.txt b/CMakeLists.txt
index f17a2b6810..548cd2271b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -229,7 +229,7 @@ if(WIN32)
       if(MINGW64_VERSION)
         message(STATUS "Found MINGW64_VERSION=${MINGW64_VERSION}")
         if(MINGW64_VERSION VERSION_LESS 3.0)
-          message(FATAL_ERROR "mingw-w64 3.0 or upper is required")
+          message(FATAL_ERROR "mingw-w64 3.0 or higher is required")
         endif()
       endif()
     endif()
@@ -1143,7 +1143,7 @@ if(USE_NGTCP2)
     elseif(OPENSSL_VERSION VERSION_GREATER_EQUAL 3.5.0)
       find_package(NGTCP2 MODULE REQUIRED COMPONENTS "ossl")
       if(NGTCP2_VERSION VERSION_LESS 1.12.0)
-        message(FATAL_ERROR "ngtcp2 1.12.0 or upper required for OpenSSL")
+        message(FATAL_ERROR "ngtcp2 1.12.0 or higher required for OpenSSL")
       endif()
       set(OPENSSL_QUIC_API2 1)
     elseif(HAVE_LIBRESSL)
diff --git a/docs/INSTALL.md b/docs/INSTALL.md
index 467aa64c05..eae04e3c79 100644
--- a/docs/INSTALL.md
+++ b/docs/INSTALL.md
@@ -334,7 +334,7 @@ cmake . \
 
 Notes:
 
-- Requires DJGPP 2.04 or upper.
+- Requires DJGPP 2.04 or higher.
 
 - Compile Watt-32 (and OpenSSL) with the same version of DJGPP. Otherwise
   things go wrong because things like FS-extensions and `errno` values have
diff --git a/lib/vtls/schannel.c b/lib/vtls/schannel.c
index 3f1324f157..1d8afe86b6 100644
--- a/lib/vtls/schannel.c
+++ b/lib/vtls/schannel.c
@@ -122,7 +122,7 @@
 /* ALPN requires version 8.1 of the Windows SDK, which was
    shipped with Visual Studio 2013, aka _MSC_VER 1800:
      https://learn.microsoft.com/previous-versions/windows/it-pro/windows-server-2012-R2-and-2012/hh831771
-   Or mingw-w64 9.0 or upper.
+   Or mingw-w64 9.0 or higher.
 */
 #if (defined(__MINGW64_VERSION_MAJOR) && __MINGW64_VERSION_MAJOR >= 9) || \
   (defined(_MSC_VER) && (_MSC_VER >= 1800) && !defined(_USING_V110_SDK71_))
@@ -2610,7 +2610,7 @@ static int schannel_init(void)
   if(p_wine_get_version) {  /* WINE detected */
     curl_off_t ver = 0;
     const char *wine_version = p_wine_get_version();  /* e.g. "6.0.2" */
-    /* Assume ALPN support with WINE 6.0 or upper */
+    /* Assume ALPN support with WINE 6.0 or higher */
     if(wine_version)
       curlx_str_number(&wine_version, &ver, 20);
     s_win_has_alpn = (ver >= 6);
diff --git a/m4/curl-openssl.m4 b/m4/curl-openssl.m4
index 816e7631fa..08d62fe7f3 100644
--- a/m4/curl-openssl.m4
+++ b/m4/curl-openssl.m4
@@ -290,7 +290,7 @@ if test "x$OPT_OPENSSL" != "xno"; then
           #endif
         ]])
       ],[],[
-        AC_MSG_ERROR([OpenSSL 3.0.0 or upper required.])
+        AC_MSG_ERROR([OpenSSL 3.0.0 or higher required.])
       ])
     fi
   fi