diff --git a/.gitignore b/.gitignore
index c75c04d..57ca978 100644
--- a/.gitignore
+++ b/.gitignore
@@ -14,3 +14,4 @@ stylesheet.css
 
 _build
 /TEST-file_"sha3.app".xml
+/TEST-file_sha3.app.xml
diff --git a/.travis.yml b/.travis.yml
index f9e5faf..639bc60 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,9 +8,10 @@ notifications:
   disabled: true
 
 otp_release:
-  - 18.0
-  - 18.1
   - 18.2
+  - 19.1
+  - 20.1
+  - 21.0
 
 cache:
   directories:
diff --git a/rebar.lock b/rebar.lock
index d6faa9e..faa17cc 100644
--- a/rebar.lock
+++ b/rebar.lock
@@ -1 +1,6 @@
-[{<<"hex2bin">>,{pkg,<<"hex2bin">>,<<"1.0.0">>},0}].
+{"1.1.0",
+[{<<"hex2bin">>,{pkg,<<"hex2bin">>,<<"1.0.0">>},0}]}.
+[
+{pkg_hash,[
+ {<<"hex2bin">>, <<"AAC26EAB998AE80EACEE1C7607C629AB503EBF77A62B9242BAE2B94D47DCB71E">>}]}
+].