diff --git a/Gemfile.lock b/Gemfile.lock
index 6c56318..c4fc68a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -5,7 +5,7 @@ PATH
       axlsx (= 3.0.0.pre)
       json
       micro-optparse
-      nokogiri (~> 1.8.2)
+      nokogiri (>= 1.8.2, < 1.14.0)
       parallel
       ruby-progressbar
       workbook
@@ -22,21 +22,25 @@ GEM
     diff-lcs (1.3)
     dotenv (2.4.0)
     htmlentities (4.3.4)
-    json (2.1.0)
+    json (2.6.1)
     method_source (0.9.0)
     micro-optparse (1.2.1)
-    mimemagic (0.3.2)
-    mini_portile2 (2.3.0)
-    nokogiri (1.8.2)
-      mini_portile2 (~> 2.3.0)
-    nokogiri (1.8.2-x64-mingw32)
-      mini_portile2 (~> 2.3.0)
-    parallel (1.12.1)
+    mimemagic (0.4.3)
+      nokogiri (~> 1)
+      rake
+    mini_portile2 (2.8.0)
+    nokogiri (1.13.3)
+      mini_portile2 (~> 2.8.0)
+      racc (~> 1.4)
+    nokogiri (1.13.3-x64-mingw32)
+      racc (~> 1.4)
+    parallel (1.21.0)
     pry (0.11.3)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
+    racc (1.6.0)
     rake (10.5.0)
-    rchardet (1.7.0)
+    rchardet (1.8.0)
     rspec (3.7.0)
       rspec-core (~> 3.7.0)
       rspec-expectations (~> 3.7.0)
@@ -50,12 +54,12 @@ GEM
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.7.0)
     rspec-support (3.7.1)
-    ruby-ole (1.2.12.1)
-    ruby-progressbar (1.9.0)
-    rubyzip (1.2.1)
-    spreadsheet (1.1.7)
-      ruby-ole (>= 1.0)
-    workbook (0.7.6)
+    ruby-ole (1.2.12.2)
+    ruby-progressbar (1.11.0)
+    rubyzip (1.3.0)
+    spreadsheet (1.3.0)
+      ruby-ole
+    workbook (0.8.1)
       axlsx (~> 3.0.0.pre)
       json (~> 2.1)
       nokogiri (~> 1.8)
diff --git a/facebook_data_analyzer.gemspec b/facebook_data_analyzer.gemspec
index 6b29d85..271a330 100644
--- a/facebook_data_analyzer.gemspec
+++ b/facebook_data_analyzer.gemspec
@@ -23,7 +23,7 @@ Gem::Specification.new do |spec|
   spec.add_dependency 'axlsx', '3.0.0.pre' # excel export
   spec.add_dependency 'json' # used for caching
   spec.add_dependency 'micro-optparse' # cli argument parser
-  spec.add_dependency 'nokogiri', '~> 1.8.2' # parser
+  spec.add_dependency 'nokogiri', '>= 1.8.2', '< 1.14.0' # parser
   spec.add_dependency 'parallel' # processing
   spec.add_dependency 'ruby-progressbar'
   spec.add_dependency 'workbook'