diff --git a/Gemfile b/Gemfile
index 5a6c0e135032ec3a7478e4f98d1c583eb9b5a282..7a68212bbef2d12d2f018263cb5fb871b578b745 100644
--- a/Gemfile
+++ b/Gemfile
@@ -66,7 +66,7 @@ gem 'u2f', '~> 0.2.1'
 gem 'validates_hostname', '~> 1.0.10'
 gem 'rubyzip', '~> 2.0.0', require: 'zip'
 # GitLab Pages letsencrypt support
-gem 'acme-client', '~> 2.0.5'
+gem 'acme-client', '~> 2.0', '>= 2.0.6'
 
 # Browser detection
 gem 'browser', '~> 2.5'
diff --git a/Gemfile.lock b/Gemfile.lock
index db03015c1e090234b3e1ce4900fd8502a49963f8..41bdf18197fc9844491ee7010ac909c397cd932d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -4,8 +4,8 @@ GEM
     RedCloth (4.3.2)
     abstract_type (0.0.7)
     ace-rails-ap (4.1.2)
-    acme-client (2.0.5)
-      faraday (~> 0.9, >= 0.9.1)
+    acme-client (2.0.6)
+      faraday (>= 0.17, < 2.0.0)
     actioncable (6.0.3.1)
       actionpack (= 6.0.3.1)
       nio4r (~> 2.0)
@@ -1158,7 +1158,7 @@ PLATFORMS
 DEPENDENCIES
   RedCloth (~> 4.3.2)
   ace-rails-ap (~> 4.1.0)
-  acme-client (~> 2.0.5)
+  acme-client (~> 2.0, >= 2.0.6)
   activerecord-explain-analyze (~> 0.1)
   acts-as-taggable-on (~> 6.0)
   addressable (~> 2.7)