diff --git a/requirements.txt b/requirements.txt
index b575b478f50d48470257314b85f5d13a3aea56c7..243292eec5c1bf77b11fc4166714d056f98fd313 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-orchestrator-core
+orchestrator-core==1.0.0
 requests
 
 pytest
diff --git a/setup.py b/setup.py
index 949282d14ef8f9aff6e2b3d6e674715a25c041f7..50d3dc63c04f6f68ec902ab6478942f252c4dc40 100644
--- a/setup.py
+++ b/setup.py
@@ -9,6 +9,7 @@ setup(
     url=('https://gitlab.geant.org/goat/geant-service-orchestrator'),
     packages=find_packages(),
     install_requires=[
-        'orchestrator-core',
+        'requests',
+        'orchestrator-core==1.0.0',
     ]
 )