diff --git a/envs/env b/envs/env
index 87cf59e7..c828aef6 100644
--- a/envs/env
+++ b/envs/env
@@ -1,3 +1,6 @@
+### Required for later numpy versions
+OPENBLAS_NUM_THREADS=1
+
 ### MedCAT cfg ###
 MEDCAT_CONFIG_FILE=/home/configs/base.txt
 
diff --git a/envs/env-prod b/envs/env-prod
index 6f2b1f3c..d9aeee10 100644
--- a/envs/env-prod
+++ b/envs/env-prod
@@ -1,3 +1,7 @@
+### Required for later numpy versions
+OPENBLAS_NUM_THREADS=1
+
+### MedCAT cfg ###
 MEDCAT_CONFIG_FILE=/home/configs/base.txt
 ENV=prod