diff --git a/src/main/java/org/asamk/signal/Manager.java b/src/main/java/org/asamk/signal/Manager.java
index b16c8eae..ee5aeeb3 100644
--- a/src/main/java/org/asamk/signal/Manager.java
+++ b/src/main/java/org/asamk/signal/Manager.java
@@ -1320,6 +1320,7 @@ class Manager implements Signal {
             if (output != null) {
                 output.close();
             }
+            input.close();
             if (!tmpFile.delete()) {
                 System.err.println("Failed to delete temp file: " + tmpFile);
             }