diff --git a/github-bot/src/main/java/io/github/martinwitt/laughing_train/mining/PeriodicMiner.java b/github-bot/src/main/java/io/github/martinwitt/laughing_train/mining/PeriodicMiner.java
index 95d9f5131..44d6fca79 100644
--- a/github-bot/src/main/java/io/github/martinwitt/laughing_train/mining/PeriodicMiner.java
+++ b/github-bot/src/main/java/io/github/martinwitt/laughing_train/mining/PeriodicMiner.java
@@ -74,7 +74,7 @@ private Project getKnownProject() {
     }
 
     void mine(@Observes StartupEvent event) {
-        vertx.setTimer(TimeUnit.MINUTES.toMillis(5), v -> mineRandomRepo());
+        vertx.setTimer(TimeUnit.MINUTES.toMillis(5), v -> vertx.executeBlocking(it -> mineRandomRepo()));
     }
 
     private void mineRandomRepo() {
@@ -107,7 +107,7 @@ private void mineRandomRepo() {
             logger.atWarning().withCause(e).log("Failed to mine random repo");
             registry.counter("mining.error").increment();
         } finally {
-            vertx.setTimer(TimeUnit.MINUTES.toMillis(1), v -> mineRandomRepo());
+            vertx.setTimer(TimeUnit.MINUTES.toMillis(1), v -> vertx.executeBlocking(it -> mineRandomRepo()));
         }
     }