diff --git a/package_arduinoFabBoards_index.json b/package_arduinoFabBoards_index.json
index fc2e01606b21547272c4a03837ea209213d7c9ac..86290091e9e3985e4041ff2ff0be08335fa8dd2d 100644
--- a/package_arduinoFabBoards_index.json
+++ b/package_arduinoFabBoards_index.json
@@ -19,7 +19,7 @@
           },
           "url": "https://gitlab.cba.mit.edu/langfordw/arduinoFabBoards/raw/master/package_arduinoFabBoards_index.zip",
           "archiveFileName": "package_arduinoFabBoards_index.zip",
-          "checksum": "",
+          "checksum": "b4486afa86125acacafbb12cd9115b2a4696a60cfdb92ae4019878f51eaf78dd",
           "size": "11032",
           "boards": [
             {"name": "ATtiny45"},