diff --git a/package.json b/package.json
index fa3b0d3..553d731 100644
--- a/package.json
+++ b/package.json
@@ -3,7 +3,7 @@
   "displayName": "Coverage Tool",
   "publisher": "justinbossis",
   "description": "Highlights coverage.py lines in VSCode",
-  "version": "0.2.0",
+  "version": "0.2.1",
   "engines": {
     "vscode": "^1.92.0"
   },
diff --git a/src/config/ConfigProvider.ts b/src/config/ConfigProvider.ts
index 8cd5141..21ab34c 100644
--- a/src/config/ConfigProvider.ts
+++ b/src/config/ConfigProvider.ts
@@ -16,6 +16,7 @@ function createDecor(bgColor: string) {
             isWholeLine: true,
             overviewRulerLane: OverviewRulerLane.Full,
             overviewRulerColor: bgColor.replace(RegExp(/0\.(\d+)/), '0.8'),
+            rangeBehavior: 1,
         },
     );
 }
diff --git a/src/extension.ts b/src/extension.ts
index cf37972..19b3aa8 100644
--- a/src/extension.ts
+++ b/src/extension.ts
@@ -105,9 +105,9 @@ async function updateCache(files: vscode.Uri) {
 }
 
 function updateDecorations(editor: vscode.TextEditor, coverage: IFileDecorationRange) {
-    editor.setDecorations(config.excludedDecor, coverage.excludedRanges);
-    editor.setDecorations(config.missingDecor, coverage.missingRanges);
-    editor.setDecorations(config.executedDecor, coverage.executedRanges);
+    editor.setDecorations(config.excludedDecor, coverage.excludedRanges.filter(range => editor.document.validateRange(range)));
+    editor.setDecorations(config.missingDecor, coverage.missingRanges.filter(range => editor.document.validateRange(range)));
+    editor.setDecorations(config.executedDecor, coverage.executedRanges.filter(range => editor.document.validateRange(range)));
 }
 
 function updateFileHighlight(editor: vscode.TextEditor) {
@@ -282,6 +282,11 @@ export async function activate(context: vscode.ExtensionContext) {
             updateFileHighlight(editor);
         }
     });
+    vscode.workspace.onDidChangeTextDocument(event => {
+        if (vscode.window.activeTextEditor && event.document === vscode.window.activeTextEditor.document) {
+            updateFileHighlight(vscode.window.activeTextEditor);
+        }
+    }, null, context.subscriptions);
 
     const rootPath = vscode.workspace.workspaceFolders && vscode.workspace.workspaceFolders.length > 0
             ? vscode.workspace.workspaceFolders[0].uri.fsPath