diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 8c216f33..dec4c2cb 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -41,6 +41,6 @@ jobs:
         make -j4
         sudo make install
     - name: Build
-      run: python3 setup.py install --user --sundials-home=/usr --blas-home=/usr/lib/x86_64-linux-gnu/ --lapack-home=/usr/lib/x86_64-linux-gnu/ --superlu-home=/usr --extra-fortran-compile-flags="-fallow-argument-mismatch"
+      run: python3 setup.py install --user --sundials-home=/usr --blas-home=/usr/lib/x86_64-linux-gnu/ --lapack-home=/usr/lib/x86_64-linux-gnu/ --superlu-home=/usr --extra-fortran-compile-flags="-fallow-argument-mismatch --std=legacy"
     - name: Test
       run: python3 -m nose --verbose tests/* tests/solvers/*
diff --git a/setup.py b/setup.py
index 5df4f057..3a317fbf 100644
--- a/setup.py
+++ b/setup.py
@@ -669,7 +669,7 @@ def fortran_extensionlists(self):
 NAME = "Assimulo"
 AUTHOR = u"C. Winther (Andersson), C. Führer, J. Åkesson, M. Gäfvert"
 AUTHOR_EMAIL = "christian.winther@modelon.com"
-VERSION = "3.5.1-dev" if version_number_arg == "Default" else version_number_arg
+VERSION = "3.5.1.dev0" if version_number_arg == "Default" else version_number_arg
 LICENSE = "LGPL"
 URL = "http://www.jmodelica.org/assimulo"
 DOWNLOAD_URL = "http://www.jmodelica.org/assimulo"