diff --git a/Gemfile.lock b/Gemfile.lock
index 6eb47503..24d4bb7a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -80,7 +80,7 @@ GEM
       execjs
     backport (1.1.2)
     bcrypt (3.1.16)
-    benchmark (0.1.0)
+    benchmark (0.1.1)
     bootstrap-sass (3.4.1)
       autoprefixer-rails (>= 5.2.1)
       sassc (>= 2.0.0)
@@ -138,6 +138,10 @@ GEM
       thor (>= 0.14, < 2.0)
     jquery-ui-rails (6.0.1)
       railties (>= 3.2.16)
+    kramdown (2.3.0)
+      rexml
+    kramdown-parser-gfm (1.1.0)
+      kramdown (~> 2.0)
     libv8 (3.16.14.19)
     listen (3.3.3)
       rb-fsevent (~> 0.10, >= 0.10.3)
@@ -149,7 +153,6 @@ GEM
       mini_mime (>= 0.1.1)
     marcel (0.3.3)
       mimemagic (~> 0.3.2)
-    maruku (0.7.3)
     method_source (1.0.0)
     mime-types (3.3.1)
       mime-types-data (~> 3.2015)
@@ -224,7 +227,7 @@ GEM
     rb-inotify (0.10.1)
       ffi (~> 1.0)
     ref (2.0.0)
-    regexp_parser (2.0.0)
+    regexp_parser (2.0.2)
     reverse_markdown (2.0.0)
       nokogiri
     rexml (3.2.4)
@@ -263,17 +266,17 @@ GEM
       simplecov_json_formatter (~> 0.1)
     simplecov-html (0.12.3)
     simplecov_json_formatter (0.1.2)
-    solargraph (0.39.17)
+    solargraph (0.40.0)
       backport (~> 1.1)
       benchmark
       bundler (>= 1.17.2)
       e2mmap
       jaro_winkler (~> 1.5)
-      maruku (~> 0.7, >= 0.7.3)
-      nokogiri (~> 1.9, >= 1.9.1)
+      kramdown (~> 2.3)
+      kramdown-parser-gfm (~> 1.1)
       parser (~> 2.3)
       reverse_markdown (>= 1.0.5, < 3)
-      rubocop (~> 0.52)
+      rubocop (>= 0.52)
       thor (~> 1.0)
       tilt (~> 2.0)
       yard (~> 0.9, >= 0.9.24)