diff --git a/Gemfile.lock b/Gemfile.lock
index 35b3ff8..8b7eea1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -38,14 +38,36 @@ GEM
       rubyzip (~> 2.3)
       seven_zip_ruby (~> 1.0)
       thor (~> 1.0)
+    expressir (0.2.27)
+      nokogiri (~> 1.10)
+      rice (~> 3)
+      thor (~> 1.0)
     expressir (0.2.27-x86_64-darwin)
       nokogiri (~> 1.10)
       thor (~> 1.0)
-    faraday (1.3.0)
+    faraday (1.10.5)
+      faraday-em_http (~> 1.0)
+      faraday-em_synchrony (~> 1.0)
+      faraday-excon (~> 1.1)
+      faraday-httpclient (~> 1.0)
+      faraday-multipart (~> 1.0)
       faraday-net_http (~> 1.0)
-      multipart-post (>= 1.2, < 3)
-      ruby2_keywords
-    faraday-net_http (1.0.1)
+      faraday-net_http_persistent (~> 1.0)
+      faraday-patron (~> 1.0)
+      faraday-rack (~> 1.0)
+      faraday-retry (~> 1.0)
+      ruby2_keywords (>= 0.0.4)
+    faraday-em_http (1.0.0)
+    faraday-em_synchrony (1.0.1)
+    faraday-excon (1.1.0)
+    faraday-httpclient (1.0.1)
+    faraday-multipart (1.2.0)
+      multipart-post (~> 2.0)
+    faraday-net_http (1.0.2)
+    faraday-net_http_persistent (1.2.0)
+    faraday-patron (1.0.0)
+    faraday-rack (1.0.0)
+    faraday-retry (1.0.4)
     faraday_middleware (1.0.0)
       faraday (~> 1.0)
     ffi (1.15.0)
@@ -56,6 +78,8 @@ GEM
       ffi (~> 1.0)
     ffi-libarchive-binary (0.2.3-x86_64-darwin)
       ffi-libarchive (~> 1.0)
+    ffi-libarchive-binary (0.2.3-x86_64-linux)
+      ffi-libarchive (~> 1.0)
     fontist (1.8.12)
       down (~> 5.0)
       excavate (~> 0.1)
@@ -264,7 +288,7 @@ GEM
     mn2pdf (1.30)
     mn2sts (1.5.0)
     multi_json (1.15.0)
-    multipart-post (2.1.1)
+    multipart-post (2.4.1)
     net-http-digest_auth (1.4.1)
     net-http-persistent (4.0.1)
       connection_pool (~> 2.2)
@@ -374,6 +398,7 @@ GEM
     reverse_markdown (1.4.0)
       nokogiri
     rexml (3.2.5)
+    rice (3.0.0)
     roman-numerals (0.3.0)
     rsec (1.0.0)
     ruby-graphviz (1.2.5)
@@ -381,7 +406,7 @@ GEM
     ruby-jing (0.0.1)
       optout (>= 0.0.2)
     ruby-ole (1.2.12.2)
-    ruby2_keywords (0.0.4)
+    ruby2_keywords (0.0.5)
     rubyzip (2.3.0)
     serrano (1.0.0)
       faraday (~> 1.1)
@@ -425,6 +450,7 @@ GEM
 
 PLATFORMS
   x86_64-darwin-19
+  x86_64-linux
 
 DEPENDENCIES
   metanorma-cli