diff --git a/src/composer/cli/blueprints.py b/src/composer/cli/blueprints.py
index dc374872..62090e86 100644
--- a/src/composer/cli/blueprints.py
+++ b/src/composer/cli/blueprints.py
@@ -328,7 +328,8 @@ def blueprints_save(socket_path, api_version, args, show_json=False):
     for blueprint in argify(args):
         api_route = client.api_url(api_version, "/blueprints/info/%s?format=toml" % blueprint)
         blueprint_toml = client.get_url_raw(socket_path, api_route)
-        open(toml_filename(blueprint), "w").write(blueprint_toml)
+        with open(toml_filename(blueprint), "w") as f:
+            f.write(blueprint_toml)
 
     return 0
 
@@ -401,7 +402,8 @@ def blueprints_push(socket_path, api_version, args, show_json=False):
         if not os.path.exists(blueprint):
             log.error("Missing blueprint file: %s", blueprint)
             continue
-        blueprint_toml = open(blueprint, "r").read()
+        with open(blueprint, "r") as f:
+            blueprint_toml = f.read()
 
         result = client.post_url_toml(socket_path, api_route, blueprint_toml)
         if handle_api_result(result, show_json)[0]:
@@ -500,7 +502,8 @@ def blueprints_freeze_save(socket_path, api_version, args, show_json=False):
     for blueprint in argify(args):
         api_route = client.api_url(api_version, "/blueprints/freeze/%s?format=toml" % blueprint)
         blueprint_toml = client.get_url_raw(socket_path, api_route)
-        open(frozen_toml_filename(blueprint), "w").write(blueprint_toml)
+        with open(frozen_toml_filename(blueprint), "w") as f:
+            f.write(blueprint_toml)
 
     return 0
 
@@ -569,7 +572,8 @@ def blueprints_workspace(socket_path, api_version, args, show_json=False):
         if not os.path.exists(blueprint):
             log.error("Missing blueprint file: %s", blueprint)
             continue
-        blueprint_toml = open(blueprint, "r").read()
+        with open(blueprint, "r") as f:
+            blueprint_toml = f.read()
 
         result = client.post_url_toml(socket_path, api_route, blueprint_toml)
         if handle_api_result(result, show_json)[0]:
diff --git a/src/composer/cli/providers.py b/src/composer/cli/providers.py
index 4503081d..286e7244 100644
--- a/src/composer/cli/providers.py
+++ b/src/composer/cli/providers.py
@@ -248,7 +248,8 @@ def providers_save(socket_path, api_version, args, show_json=False, testmode=0):
             "profile": args[1],
             "settings": results[args[0]]["profiles"][args[1]]
         }
-        open(toml_filename(args[1]), "w").write(toml.dumps(profile))
+        with open(toml_filename(args[1]), "w") as f:
+            f.write(toml.dumps(profile))
 
     return 0
 
diff --git a/src/composer/cli/sources.py b/src/composer/cli/sources.py
index 79e02e62..7b864024 100644
--- a/src/composer/cli/sources.py
+++ b/src/composer/cli/sources.py
@@ -125,7 +125,8 @@ def sources_add(socket_path, api_version, args, show_json=False):
         if not os.path.exists(source):
             log.error("Missing source file: %s", source)
             continue
-        source_toml = open(source, "r").read()
+        with open(source, "r") as f:
+            source_toml = f.read()
 
         result = client.post_url_toml(socket_path, api_route, source_toml)
         if handle_api_result(result, show_json)[0]: