diff --git a/runelite-client/src/main/java/net/runelite/client/plugins/screenshot/ScreenshotInput.java b/runelite-client/src/main/java/net/runelite/client/plugins/screenshot/ScreenshotInput.java
index 1400f94639..0501332eef 100644
--- a/runelite-client/src/main/java/net/runelite/client/plugins/screenshot/ScreenshotInput.java
+++ b/runelite-client/src/main/java/net/runelite/client/plugins/screenshot/ScreenshotInput.java
@@ -28,7 +28,7 @@ import java.awt.event.KeyEvent;
 import java.util.Date;
 import javax.inject.Inject;
 import net.runelite.client.input.KeyListener;
-import static net.runelite.client.plugins.screenshot.ScreenshotPlugin.TIME_FORMAT;
+import static net.runelite.client.plugins.screenshot.ScreenshotPlugin.format;
 
 public class ScreenshotInput implements KeyListener
 {
@@ -60,7 +60,7 @@ public class ScreenshotInput implements KeyListener
 
 		if (event.getKeyCode() == KeyEvent.VK_INSERT)
 		{
-			plugin.takeScreenshot(TIME_FORMAT.format(new Date()));
+			plugin.takeScreenshot(format(new Date()));
 		}
 	}
 
diff --git a/runelite-client/src/main/java/net/runelite/client/plugins/screenshot/ScreenshotPlugin.java b/runelite-client/src/main/java/net/runelite/client/plugins/screenshot/ScreenshotPlugin.java
index 19e116adf2..fbf2922a18 100644
--- a/runelite-client/src/main/java/net/runelite/client/plugins/screenshot/ScreenshotPlugin.java
+++ b/runelite-client/src/main/java/net/runelite/client/plugins/screenshot/ScreenshotPlugin.java
@@ -102,7 +102,7 @@ public class ScreenshotPlugin extends Plugin
 	private static final HttpUrl IMGUR_IMAGE_UPLOAD_URL = HttpUrl.parse("https://api.imgur.com/3/image");
 	private static final MediaType JSON = MediaType.parse("application/json");
 
-	static final DateFormat TIME_FORMAT = new SimpleDateFormat("yyyy-MM-dd_HH-mm-ss");
+	private static final DateFormat TIME_FORMAT = new SimpleDateFormat("yyyy-MM-dd_HH-mm-ss");
 
 	private static final Pattern NUMBER_PATTERN = Pattern.compile("([0-9]+)");
 	private static final Pattern LEVEL_UP_PATTERN = Pattern.compile("Your ([a-zA-Z]+) (?:level is|are)? now (\\d+)\\.");
@@ -116,6 +116,14 @@ public class ScreenshotPlugin extends Plugin
 		"Can anyone defeat you? Certainly", "was no match for you", "You were clearly a better fighter than", "RIP",
 		"You have defeated", "What an embarrassing performance by", "was no match for your awesomeness");
 
+	static String format(Date date)
+	{
+		synchronized (TIME_FORMAT)
+		{
+			return TIME_FORMAT.format(date);
+		}
+	}
+
 	private String clueType;
 	private Integer clueNumber;
 
@@ -182,7 +190,7 @@ public class ScreenshotPlugin extends Plugin
 			titleBarButton = NavigationButton.builder()
 				.tooltip("Take screenshot")
 				.icon(iconImage)
-				.onClick(() -> takeScreenshot(TIME_FORMAT.format(new Date())))
+				.onClick(() -> takeScreenshot(format(new Date())))
 				.popup(ImmutableMap
 					.<String, Runnable>builder()
 					.put("Open screenshot folder...", () ->
@@ -259,13 +267,13 @@ public class ScreenshotPlugin extends Plugin
 
 		if (config.screenshotPet() && PET_MESSAGES.stream().anyMatch(chatMessage::contains))
 		{
-			String fileName = "Pet " + TIME_FORMAT.format(new Date());
+			String fileName = "Pet " + format(new Date());
 			takeScreenshot(fileName);
 		}
 
 		if (config.screenshotKills() && KILL_MESSAGES.stream().anyMatch(chatMessage::contains))
 		{
-			String fileName = "Kill " + TIME_FORMAT.format(new Date());
+			String fileName = "Kill " + format(new Date());
 			takeScreenshot(fileName);
 		}
 	}