diff --git a/src/vs/workbench/contrib/scm/browser/quickDiff.contribution.ts b/src/vs/workbench/contrib/scm/browser/quickDiff.contribution.ts
index 0f64f598720006..91803a521138ee 100644
--- a/src/vs/workbench/contrib/scm/browser/quickDiff.contribution.ts
+++ b/src/vs/workbench/contrib/scm/browser/quickDiff.contribution.ts
@@ -55,7 +55,8 @@ Registry.as<IConfigurationRegistry>(ConfigurationExtensions.Configuration).regis
 		},
 		'scm.diffDecorationsGutterWidth': {
 			type: 'number',
-			enum: [1, 2, 3, 4, 5],
+			minimum: 1,
+			maximum: 20,
 			default: 3,
 			description: localize('diffGutterWidth', "Controls the width(px) of diff decorations in gutter (added & modified).")
 		},
diff --git a/src/vs/workbench/contrib/scm/browser/quickDiffDecorator.ts b/src/vs/workbench/contrib/scm/browser/quickDiffDecorator.ts
index 12509dfbbc2efe..fe1274a9961a10 100644
--- a/src/vs/workbench/contrib/scm/browser/quickDiffDecorator.ts
+++ b/src/vs/workbench/contrib/scm/browser/quickDiffDecorator.ts
@@ -274,7 +274,7 @@ export class QuickDiffWorkbenchController extends Disposable implements IWorkben
 	private onDidChangeDiffWidthConfiguration(): void {
 		let width = this.configurationService.getValue<number>('scm.diffDecorationsGutterWidth');
 
-		if (isNaN(width) || width <= 0 || width > 5) {
+		if (isNaN(width) || width <= 0 || width > 20) {
 			width = 3;
 		}
 
diff --git a/src/vs/workbench/contrib/scm/browser/scm.contribution.ts b/src/vs/workbench/contrib/scm/browser/scm.contribution.ts
index 6ee2a32c3a8def..96e02fbb9fc53a 100644
--- a/src/vs/workbench/contrib/scm/browser/scm.contribution.ts
+++ b/src/vs/workbench/contrib/scm/browser/scm.contribution.ts
@@ -184,7 +184,8 @@ Registry.as<IConfigurationRegistry>(ConfigurationExtensions.Configuration).regis
 		},
 		'scm.diffDecorationsGutterWidth': {
 			type: 'number',
-			enum: [1, 2, 3, 4, 5],
+			minimum: 1,
+			maximum: 20,
 			default: 3,
 			description: localize('diffGutterWidth', "Controls the width(px) of diff decorations in gutter (added & modified).")
 		},