diff --git a/scripts/cmake/ConanSetup.cmake b/scripts/cmake/ConanSetup.cmake
index 4e635f4821154b61551b9187e7a2c01db97d778a..1718ef41016fc49f0e50d3d3698f16385048b4ff 100644
--- a/scripts/cmake/ConanSetup.cmake
+++ b/scripts/cmake/ConanSetup.cmake
@@ -48,12 +48,16 @@ if(OGS_USE_MFRONT)
 endif()
 
 if(OGS_BUILD_GUI)
+    set(QT_VERSION ${ogs.minimum_version.qt})
+    if(UNIX)
+        set(QT_VERSION ${ogs.tested_version.qt})
+    endif()
     set(CONAN_REQUIRES ${CONAN_REQUIRES}
         # libgeotiff/1.4.2@bilke/stable # TODO
         # Overrides for dependency mismatches
         bzip2/1.0.8
         zlib/1.2.11
-        qt/${ogs.minimum_version.qt}@bincrafters/stable
+        qt/${QT_VERSION}@bincrafters/stable
     )
     set(CONAN_OPTIONS ${CONAN_OPTIONS}
         qt:qtxmlpatterns=True
@@ -71,6 +75,9 @@ if(OGS_BUILD_GUI)
     if(MSVC)
         set(CONAN_OPTIONS ${CONAN_OPTIONS} qt:with_harfbuzz=False)
     endif()
+    if(UNIX AND NOT APPLE)
+        list(APPEND CONAN_OPTIONS qt:qtx11extras=True)
+    endif()
 endif()
 
 if(OGS_USE_NETCDF)
diff --git a/web/data/versions.json b/web/data/versions.json
index dde12df8ea81025f3523aae31d7be7f3d4f87cc1..ba7c184a27140d5b1bf2cbe5cfb76c05d16e3a30 100644
--- a/web/data/versions.json
+++ b/web/data/versions.json
@@ -24,7 +24,8 @@
     "libxml2": "2.9.10"
   },
   "tested_version": {
-    "ubuntu": "20.04"
+    "ubuntu": "20.04",
+    "qt": "5.15.2"
   },
   "ctest": {
     "large_runtime": 60