diff --git a/Gemfile.lock b/Gemfile.lock
index ae70653..246da2a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,8 +1,8 @@
 PATH
   remote: .
   specs:
-    rsmp (0.34.0)
-      async (~> 2.16)
+    rsmp (0.34.1)
+      async (~> 2.21)
       async-io (~> 1.43)
       colorize (~> 1.1)
       logger (~> 1.6)
@@ -64,14 +64,14 @@ GEM
       fiber-storage
     fiber-storage (1.0.0)
     hana (1.3.7)
-    io-event (1.7.4)
+    io-event (1.7.5)
     json (2.9.0)
     json_schemer (2.3.0)
       bigdecimal
       hana (~> 1.3)
       regexp_parser (~> 2.0)
       simpleidn (~> 0.2)
-    logger (1.6.2)
+    logger (1.6.3)
     mini_mime (1.1.5)
     multi_test (1.1.0)
     ostruct (0.6.1)
diff --git a/lib/rsmp/version.rb b/lib/rsmp/version.rb
index 3f0b25a..c26cd77 100644
--- a/lib/rsmp/version.rb
+++ b/lib/rsmp/version.rb
@@ -1,3 +1,3 @@
 module RSMP
-  VERSION = "0.34.0"
+  VERSION = "0.34.1"
 end
diff --git a/rsmp.gemspec b/rsmp.gemspec
index d23ddff..a79a82e 100644
--- a/rsmp.gemspec
+++ b/rsmp.gemspec
@@ -32,7 +32,7 @@ Gem::Specification.new do |spec|
 
   spec.add_dependency "logger", "~> 1.6"
   spec.add_dependency "ostruct", "~> 0.6"
-  spec.add_dependency "async", "~> 2.16"
+  spec.add_dependency "async", "~> 2.21"
   spec.add_dependency "async-io", "~> 1.43"
   spec.add_dependency "colorize", "~> 1.1"
   spec.add_dependency "rsmp_schema", "~> 0.8"