diff --git a/var/spack/repos/builtin/packages/margo/package.py b/var/spack/repos/builtin/packages/margo/package.py
index 30e124cac64..d43d29841f2 100644
--- a/var/spack/repos/builtin/packages/margo/package.py
+++ b/var/spack/repos/builtin/packages/margo/package.py
@@ -28,7 +28,7 @@ class Margo(AutotoolsPackage):
     depends_on('pkgconfig', type='build')
 
     depends_on('mercury')
-    depends_on('argobots@1.0rc1:')
+    depends_on('argobots@1.0:')
 
     build_directory = 'spack-build'