diff --git a/Gemfile b/Gemfile
index c7f947ce..cbd6f14d 100644
--- a/Gemfile
+++ b/Gemfile
@@ -15,7 +15,7 @@ gem "dhis2", github: "BLSQ/dhis2", branch: "legacy-v2"
 gem "paper_trail", "~> 10.1.0"
 gem "paper_trail-association_tracking", "~> 1.0.0"
 gem "pg", "~> 0.18"
-gem "puma", "~> 3.12"
+gem "puma", "~> 4.3.10"
 gem "rack", ">= 2.0.6"
 gem "rails", "~> 5.2", "< 5.3"
 gem "activerecord-nulldb-adapter"
diff --git a/Gemfile.lock b/Gemfile.lock
index bbe4cf60..d2eb2210 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -306,7 +306,8 @@ GEM
     pry-rails (0.3.9)
       pry (>= 0.10.4)
     public_suffix (3.1.1)
-    puma (3.12.6)
+    puma (4.3.10)
+      nio4r (~> 2.0)
     racc (1.5.2)
     rack (2.2.3)
     rack-mini-profiler (1.0.1)
@@ -570,7 +571,7 @@ DEPENDENCIES
   pronto-simplecov
   pry (~> 0.12.2)
   pry-rails (~> 0.3.9)
-  puma (~> 3.12)
+  puma (~> 4.3.10)
   rack (>= 2.0.6)
   rack-mini-profiler
   rails (~> 5.2, < 5.3)