diff --git a/.github/fly-wsproxies/paris-coder.toml b/.github/fly-wsproxies/paris-coder.toml
index a68ceff07d..c6d515809c 100644
--- a/.github/fly-wsproxies/paris-coder.toml
+++ b/.github/fly-wsproxies/paris-coder.toml
@@ -22,6 +22,12 @@ primary_region = "cdg"
   auto_start_machines = true
   min_machines_running = 0
 
+# Ref: https://fly.io/docs/reference/configuration/#http_service-concurrency
+[http_service.concurrency]
+  type = "requests"
+  soft_limit = 50
+  hard_limit = 100
+
 [[vm]]
   cpu_kind = "shared"
   cpus = 2
diff --git a/.github/fly-wsproxies/sao-paulo-coder.toml b/.github/fly-wsproxies/sao-paulo-coder.toml
index 0866d61af4..b6c9b96463 100644
--- a/.github/fly-wsproxies/sao-paulo-coder.toml
+++ b/.github/fly-wsproxies/sao-paulo-coder.toml
@@ -22,6 +22,12 @@ primary_region = "gru"
   auto_start_machines = true
   min_machines_running = 0
 
+# Ref: https://fly.io/docs/reference/configuration/#http_service-concurrency
+[http_service.concurrency]
+  type = "requests"
+  soft_limit = 50
+  hard_limit = 100
+
 [[vm]]
   cpu_kind = "shared"
   cpus = 2
diff --git a/.github/fly-wsproxies/sydney-coder.toml b/.github/fly-wsproxies/sydney-coder.toml
index b2fd4d8ed5..e3a24b4408 100644
--- a/.github/fly-wsproxies/sydney-coder.toml
+++ b/.github/fly-wsproxies/sydney-coder.toml
@@ -22,6 +22,12 @@ primary_region = "syd"
   auto_start_machines = true
   min_machines_running = 0
 
+# Ref: https://fly.io/docs/reference/configuration/#http_service-concurrency
+[http_service.concurrency]
+  type = "requests"
+  soft_limit = 50
+  hard_limit = 100
+
 [[vm]]
   cpu_kind = "shared"
   cpus = 2