diff --git a/main/ui/src/main/resources/css/dark_theme.css b/main/ui/src/main/resources/css/dark_theme.css
index f67c0c617..eb1191852 100644
--- a/main/ui/src/main/resources/css/dark_theme.css
+++ b/main/ui/src/main/resources/css/dark_theme.css
@@ -80,6 +80,7 @@
 	INDICATOR_BG: RED_5;
 	PROGRESS_INDICATOR_BEGIN: GRAY_7;
 	PROGRESS_INDICATOR_END: GRAY_5;
+	PROGRESS_BAR_BG: GRAY_2;
 	PASSWORD_STRENGTH_INDICATOR_BG: GRAY_3;
 	PASSWORD_STRENGTH_INDICATOR_BG_STRENGTH_0: RED_5;
 	PASSWORD_STRENGTH_INDICATOR_BG_STRENGTH_1: ORANGE_5;
@@ -780,3 +781,31 @@
 .progress-indicator:indeterminate .segment11 {
 	-fx-shape:"m 14.321262,6.5816808 c -0.824944,0.3797564 -0.10368,1.8484772 0.718513,1.3544717 L 18.786514,5.9486042 C 19.644992,5.4932031 18.92648,4.1387308 18.068001,4.5941315 z";
 }
+
+/*******************************************************************************
+ *                                                                             *
+ * ProgressBar                                                                 *
+ *                                                                             *
+ ******************************************************************************/
+
+.progress-bar {
+	-fx-indeterminate-bar-length: 100;
+	-fx-indeterminate-bar-escape: true;
+	-fx-indeterminate-bar-flip: true;
+	-fx-indeterminate-bar-animation-time: 2;
+}
+
+.progress-bar > .bar {
+	-fx-background-color: CONTROL_PRIMARY_BG_NORMAL;
+	-fx-background-radius: 4px;
+	-fx-padding: 0.5em;
+}
+
+.progress-bar:indeterminate > .bar {
+	-fx-background-color: linear-gradient(to left, transparent, CONTROL_PRIMARY_BG_NORMAL);
+}
+
+.progress-bar > .track {
+	-fx-background-color: PROGRESS_BAR_BG;
+	-fx-background-radius: 4px;
+}
diff --git a/main/ui/src/main/resources/css/light_theme.css b/main/ui/src/main/resources/css/light_theme.css
index a7409724c..40b067d5d 100644
--- a/main/ui/src/main/resources/css/light_theme.css
+++ b/main/ui/src/main/resources/css/light_theme.css
@@ -80,6 +80,7 @@
 	INDICATOR_BG: RED_5;
 	PROGRESS_INDICATOR_BEGIN: GRAY_2;
 	PROGRESS_INDICATOR_END: GRAY_4;
+	PROGRESS_BAR_BG: GRAY_8;
 	PASSWORD_STRENGTH_INDICATOR_BG: GRAY_5;
 	PASSWORD_STRENGTH_INDICATOR_BG_STRENGTH_0: RED_5;
 	PASSWORD_STRENGTH_INDICATOR_BG_STRENGTH_1: ORANGE_5;
@@ -780,3 +781,31 @@
 .progress-indicator:indeterminate .segment11 {
 	-fx-shape:"m 14.321262,6.5816808 c -0.824944,0.3797564 -0.10368,1.8484772 0.718513,1.3544717 L 18.786514,5.9486042 C 19.644992,5.4932031 18.92648,4.1387308 18.068001,4.5941315 z";
 }
+
+/*******************************************************************************
+ *                                                                             *
+ * ProgressBar                                                                 *
+ *                                                                             *
+ ******************************************************************************/
+
+.progress-bar {
+	-fx-indeterminate-bar-length: 100;
+	-fx-indeterminate-bar-escape: true;
+	-fx-indeterminate-bar-flip: true;
+	-fx-indeterminate-bar-animation-time: 2;
+}
+
+.progress-bar > .bar {
+	-fx-background-color: CONTROL_PRIMARY_BG_NORMAL;
+	-fx-background-radius: 4px;
+	-fx-padding: 0.5em;
+}
+
+.progress-bar:indeterminate > .bar {
+	-fx-background-color: linear-gradient(to left, transparent, CONTROL_PRIMARY_BG_NORMAL);
+}
+
+.progress-bar > .track {
+	-fx-background-color: PROGRESS_BAR_BG;
+	-fx-background-radius: 4px;
+}
diff --git a/main/ui/src/main/resources/fxml/migration_run.fxml b/main/ui/src/main/resources/fxml/migration_run.fxml
index a932b449f..207b011e3 100644
--- a/main/ui/src/main/resources/fxml/migration_run.fxml
+++ b/main/ui/src/main/resources/fxml/migration_run.fxml
@@ -3,6 +3,7 @@
 <?import javafx.geometry.Insets?>
 <?import javafx.scene.control.Button?>
 <?import javafx.scene.control.ButtonBar?>
+<?import javafx.scene.control.ProgressBar?>
 <?import javafx.scene.control.ProgressIndicator?>
 <?import javafx.scene.layout.VBox?>
 <?import org.cryptomator.ui.controls.FormattedLabel?>
@@ -23,7 +24,7 @@
 			<NiceSecurePasswordField fx:id="passwordField"/>
 		</VBox>
 
-		<!-- TODO add a progress bar... -->
+		<ProgressBar progress="${controller.migrationProgress}" prefWidth="Infinity"/>
 		<FormattedLabel format="progress: %.3f" arg1="${controller.migrationProgress}"/>
 
 		<VBox alignment="BOTTOM_CENTER" VBox.vgrow="ALWAYS">