diff --git a/setup.py b/setup.py
index 94c85bb..f7d11d6 100644
--- a/setup.py
+++ b/setup.py
@@ -31,7 +31,7 @@
     "google-api-core[grpc] >= 1.26.0, <3.0.0dev",
     "proto-plus >= 1.15.0",
     "packaging >= 14.3",
-    "google-cloud-source-context >= 0.1.0, < 1.0.0dev",
+    "google-cloud-source-context >= 1.0.0",
 ]
 
 package_root = os.path.abspath(os.path.dirname(__file__))
diff --git a/testing/constraints-3.6.txt b/testing/constraints-3.6.txt
index 392210e..bc833f8 100644
--- a/testing/constraints-3.6.txt
+++ b/testing/constraints-3.6.txt
@@ -7,5 +7,5 @@
 google-api-core==1.26.0
 proto-plus==1.15.0
 packaging==14.3
-google-cloud-source-context==0.1.0
-google-auth==1.24.0  # TODO: remove when google-auth>=1.25.0 si transitively required through google-api-core
\ No newline at end of file
+google-cloud-source-context==1.0.0
+google-auth==1.24.0  # TODO: remove when google-auth>=1.25.0 si transitively required through google-api-core