diff --git a/src/main/java/istlab/KisoJikken/Launcher.java b/src/main/java/istlab/KisoJikken/Launcher.java
index 7277ae7..150d20e 100644
--- a/src/main/java/istlab/KisoJikken/Launcher.java
+++ b/src/main/java/istlab/KisoJikken/Launcher.java
@@ -216,6 +216,9 @@
                     fileOutputStream.getChannel().transferFrom(readableByteChannel, 0, Long.MAX_VALUE);
                     fileChannel.close();
                     fileOutputStream.close();
+
+                    File execjar = new File(execPath.getParent().toString()+File.separator+latestVersion);
+                    execjar.setExecutable(true);
                 } catch (Exception ex) {
                 } finally {
                 }