diff --git a/Dockerfile b/Dockerfile
index 61f80ab..4b62897 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,10 +1,10 @@
 FROM cloudforet/python-core:2.0
 
-ENV PYTHONUNBUFFERED 1
-ENV SPACEONE_PORT 50051
-ENV SERVER_TYPE grpc
-ENV PKG_DIR /tmp/pkg
-ENV SRC_DIR /tmp/src
+ENV PYTHONUNBUFFERED=1
+ENV SPACEONE_PORT=50051
+ENV SERVER_TYPE=grpc
+ENV PKG_DIR=/tmp/pkg
+ENV SRC_DIR=/tmp/src
 
 RUN apt update && apt upgrade -y
 
diff --git a/pkg/pip_requirements.txt b/pkg/pip_requirements.txt
index fc9497f..165f17c 100644
--- a/pkg/pip_requirements.txt
+++ b/pkg/pip_requirements.txt
@@ -1,2 +1,2 @@
-spaceone-core
-spaceone-api
\ No newline at end of file
+spaceone-api
+boto3
\ No newline at end of file
diff --git a/src/plugin/manager/ec2/snapshot_manager.py b/src/plugin/manager/ec2/snapshot_manager.py
index 19608a8..d7ce8b4 100644
--- a/src/plugin/manager/ec2/snapshot_manager.py
+++ b/src/plugin/manager/ec2/snapshot_manager.py
@@ -43,7 +43,6 @@ def create_cloud_service(self, region, options, secret_data, schema):
                 try:
                     if name := self._get_name_from_tags(raw.get("Tags", [])):
                         raw["name"] = name
-
                     raw.update(
                         {
                             "cloudtrail": self.set_cloudtrail(
@@ -67,10 +66,16 @@ def create_cloud_service(self, region, options, secret_data, schema):
                             }
                         )
 
+                    print(type(raw.get("StartTime")))
                     self._update_times(raw)
+                    print(raw.get("StartTime"))
+                    print(type(raw.get("StartTime")))
 
                     snapshot_vo = raw
 
+                    print(type(snapshot_vo.get("StartTime")))
+                    print(f"DATA : {snapshot_vo}")
+
                     resource_id = snapshot_vo.get("arn", "")
                     snapshot_id = snapshot_vo.get("SnapshotId", "")
                     link = f"https://console.aws.amazon.com/ec2/v2/home?region={region}#Snapshots:visibility=owned-by-me;snapshotId={snapshot_id};sort=snapshotId"
diff --git a/src/setup.py b/src/setup.py
index cf5233c..f768091 100644
--- a/src/setup.py
+++ b/src/setup.py
@@ -30,7 +30,7 @@
     author_email="admin@spaceone.dev",
     license="Apache License 2.0",
     packages=find_packages(),
-    install_requires=["spaceone-core", "spaceone-api", "spaceone-inventory"],
+    install_requires=["spaceone-api", "spaceone-inventory"],
     package_data={
         "plugin": [
             "metadata/**/*.yaml",