diff --git a/requirements.txt b/requirements.txt
index 6ef0fbb77..11dff81f0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,7 +5,7 @@ cymem>=1.30,<1.32
 preshed>=0.46.1,<0.47.0
 thinc>=5.0.0,<5.1.0
 murmurhash>=0.26,<0.27
-plac
+plac<0.9.3
 six
 ujson
 cloudpickle
diff --git a/spacy/download.py b/spacy/download.py
index f7fc798ae..4fbc6b11b 100644
--- a/spacy/download.py
+++ b/spacy/download.py
@@ -17,7 +17,7 @@ def download(lang, force=False):
         sputnik.package(about.__title__, about.__version__, about.__models__[lang])
         print("Model already installed. Please run 'python -m "
               "spacy.%s.download --force' to reinstall." % lang, file=sys.stderr)
-        sys.exit(1)
+        sys.exit(0)
     except (PackageNotFoundException, CompatiblePackageNotFoundException):
         pass