diff --git a/spock-core/src/main/java/org/spockframework/compiler/SpockTransform.java b/spock-core/src/main/java/org/spockframework/compiler/SpockTransform.java
index 51afd13ded..02ea5a060c 100755
--- a/spock-core/src/main/java/org/spockframework/compiler/SpockTransform.java
+++ b/spock-core/src/main/java/org/spockframework/compiler/SpockTransform.java
@@ -81,7 +81,7 @@ void processSpec(SourceUnit sourceUnit, ClassNode clazz, ErrorReporter errorRepo
         }
       } catch (Exception e) {
         errorReporter.error(
-            "Unexpected error during compilation of spec '%s'. Maybe you have used invalid Spock syntax? Anyway, please file a bug report at http://issues.spockframework.org.",
+            "Unexpected error during compilation of spec '%s'. Maybe you have used invalid Spock syntax? Anyway, please file a bug report at https://issues.spockframework.org.",
             e, clazz.getName());
       }
     }
diff --git a/spock-core/src/main/java/org/spockframework/util/VersionChecker.java b/spock-core/src/main/java/org/spockframework/util/VersionChecker.java
index f1d43fe5fd..8ba7b28815 100644
--- a/spock-core/src/main/java/org/spockframework/util/VersionChecker.java
+++ b/spock-core/src/main/java/org/spockframework/util/VersionChecker.java
@@ -31,7 +31,7 @@ public void checkGroovyVersion(String whoIsChecking) {
       } else {
         throw new IncompatibleGroovyVersionException(format(
         "The Spock %s cannot execute because Spock %s is not compatible with Groovy %s. For more information (including enforce mode), " +
-        "see http://docs.spockframework.org (section 'Known Issues').\n" +
+        "see https://docs.spockframework.org (section 'Known Issues').\n" +
         "Spock artifact: %s\n" +
         "Groovy artifact: %s",
                 whoIsChecking, SpockReleaseInfo.getVersion(), GroovyReleaseInfo.getVersion(),