diff --git a/applications/solvcon/entry.sh b/applications/solvcon/entry.sh
index 2ffa5b4..f906034 100755
--- a/applications/solvcon/entry.sh
+++ b/applications/solvcon/entry.sh
@@ -41,7 +41,8 @@ devenv build cmake
 devenv build scotch
 
 # prepare all packages to build SOLVCON
-pip3 install nose boto paramiko netCDF4 numpy
+pip3 install nose boto paramiko netCDF4
+pip3 install numpy==1.21.4
 devenv build pybind11
 devenv build gmsh
 devenv build hdf