diff --git a/.travis.yml b/.travis.yml
index 92852cf..84c797e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -19,8 +19,8 @@ env:
     - GOARCH=386
 
 script:
-  - go vet ./...
-  - go test ./... -v -coverprofile=coverage.txt -covermode=atomic
+  - env GO111MODULE=on go vet ./...
+  - env GO111MODULE=on go test ./... -v -coverprofile=coverage.txt -covermode=atomic
 
 after_success:
   - bash <(curl -s https://codecov.io/bash)
diff --git a/comment.go b/comment.go
index 8414b40..6010891 100644
--- a/comment.go
+++ b/comment.go
@@ -164,7 +164,7 @@ func (f *File) addDrawingVML(commentID int, drawingVML, cell string, lineCount,
 				},
 				VPath: &vPath{
 					Gradientshapeok: "t",
-					Connecttype:     "miter",
+					Connecttype:     "rect",
 				},
 			},
 		}