diff --git a/app/cli/cmd/artifact_download.go b/app/cli/cmd/artifact_download.go
index c1392e305..8f487c32c 100644
--- a/app/cli/cmd/artifact_download.go
+++ b/app/cli/cmd/artifact_download.go
@@ -49,6 +49,13 @@ func newArtifactDownloadCmd() *cobra.Command {
 
 			return action.NewArtifactDownload(opts).Run(downloadPath, digest)
 		},
+		PostRunE: func(cmd *cobra.Command, args []string) error {
+			if artifactCASConn != nil {
+				return artifactCASConn.Close()
+			}
+
+			return nil
+		},
 	}
 
 	cmd.Flags().StringVarP(&digest, "digest", "d", "", "digest of the file to download")
diff --git a/app/cli/cmd/artifact_upload.go b/app/cli/cmd/artifact_upload.go
index b87ba5475..26181b00d 100644
--- a/app/cli/cmd/artifact_upload.go
+++ b/app/cli/cmd/artifact_upload.go
@@ -49,6 +49,13 @@ func newArtifactUploadCmd() *cobra.Command {
 			_, err := action.NewArtifactUpload(opts).Run(filePath)
 			return err
 		},
+		PostRunE: func(cmd *cobra.Command, args []string) error {
+			if artifactCASConn != nil {
+				return artifactCASConn.Close()
+			}
+
+			return nil
+		},
 	}
 
 	cmd.Flags().StringVarP(&filePath, "file", "f", "", "path to file to upload")
diff --git a/app/cli/cmd/attestation_add.go b/app/cli/cmd/attestation_add.go
index 3ddd4a8d3..1b6288386 100644
--- a/app/cli/cmd/attestation_add.go
+++ b/app/cli/cmd/attestation_add.go
@@ -72,6 +72,13 @@ func newAttestationAddCmd() *cobra.Command {
 
 			logger.Info().Msg("material added to attestation")
 
+			return nil
+		},
+		PostRunE: func(cmd *cobra.Command, args []string) error {
+			if artifactCASConn != nil {
+				return artifactCASConn.Close()
+			}
+
 			return nil
 		},
 	}