diff --git a/commafeed-server/src/main/java/com/commafeed/backend/feed/parser/FeedCleaner.java b/commafeed-server/src/main/java/com/commafeed/backend/feed/parser/FeedCleaner.java
index 02c7d84d..5389fd61 100644
--- a/commafeed-server/src/main/java/com/commafeed/backend/feed/parser/FeedCleaner.java
+++ b/commafeed-server/src/main/java/com/commafeed/backend/feed/parser/FeedCleaner.java
@@ -38,7 +38,7 @@ class FeedCleaner {
 		return sb.toString();
 	}
 
-	// https://stackoverflow.com/a/40836618/1885506
+	// https://stackoverflow.com/a/40836618
 	public String replaceHtmlEntitiesWithNumericEntities(String source) {
 		// Create a buffer sufficiently large that re-allocations are minimized.
 		StringBuilder sb = new StringBuilder(source.length() << 1);
diff --git a/commafeed-server/src/main/resources/migrations.xml b/commafeed-server/src/main/resources/migrations.xml
index 8b17f7a0..2d951ed1 100644
--- a/commafeed-server/src/main/resources/migrations.xml
+++ b/commafeed-server/src/main/resources/migrations.xml
@@ -8,7 +8,7 @@
 
 	<!-- liquibase uses the 'TIMESTAMP WITHOUT TIME ZONE' type by default, which is not a UTC timestamp -->
 	<!-- postgresql UTC timestamp is actually 'TIMESTAMP WITH TIME ZONE' -->
-	<!-- see https://stackoverflow.com/a/48069726/1885506 -->
+	<!-- see https://stackoverflow.com/a/48069726 -->
 	<property name="timestamp_type" value="timestamp with time zone" dbms="postgresql" />
 	<property name="timestamp_type" value="timestamp" dbms="h2,mysql,mariadb,mssql" />
 
diff --git a/commafeed-server/src/test/java/com/commafeed/backend/HttpGetterTest.java b/commafeed-server/src/test/java/com/commafeed/backend/HttpGetterTest.java
index 5580f9c2..1e3037cb 100644
--- a/commafeed-server/src/test/java/com/commafeed/backend/HttpGetterTest.java
+++ b/commafeed-server/src/test/java/com/commafeed/backend/HttpGetterTest.java
@@ -126,7 +126,7 @@ class HttpGetterTest {
 	@Test
 	void connectTimeout() {
 		// try to connect to a non-routable address
-		// https://stackoverflow.com/a/904609/1885506
+		// https://stackoverflow.com/a/904609
 		Assertions.assertThrows(ConnectTimeoutException.class, () -> getter.getBinary("http://10.255.255.1", 2000));
 	}