diff --git a/examples/nrf51/Cargo.toml b/examples/nrf51/Cargo.toml
index 8507c415c..d1e919a33 100644
--- a/examples/nrf51/Cargo.toml
+++ b/examples/nrf51/Cargo.toml
@@ -5,7 +5,7 @@ version = "0.1.0"
 license = "MIT OR Apache-2.0"
 
 [dependencies]
-embassy-executor = { version = "0.5.0", path = "../../embassy-executor", features = ["task-arena-size-8192", "arch-cortex-m", "executor-thread", "executor-interrupt", "defmt", "integrated-timers"] }
+embassy-executor = { version = "0.5.0", path = "../../embassy-executor", features = ["task-arena-size-4096", "arch-cortex-m", "executor-thread", "executor-interrupt", "defmt", "integrated-timers"] }
 embassy-time = { version = "0.3.0", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime"] }
 embassy-nrf = { version = "0.1.0", path = "../../embassy-nrf", features = ["defmt", "nrf51", "time-driver-rtc1", "unstable-pac", "time", "rt"] }
 
diff --git a/tests/nrf51422/Cargo.toml b/tests/nrf51422/Cargo.toml
index d95f122b0..246b71117 100644
--- a/tests/nrf51422/Cargo.toml
+++ b/tests/nrf51422/Cargo.toml
@@ -8,7 +8,7 @@ license = "MIT OR Apache-2.0"
 teleprobe-meta = "1"
 
 embassy-sync = { version = "0.5.0", path = "../../embassy-sync", features = ["defmt", ] }
-embassy-executor = { version = "0.5.0", path = "../../embassy-executor", features = ["arch-cortex-m", "executor-thread", "defmt", "task-arena-size-8192", "integrated-timers"] }
+embassy-executor = { version = "0.5.0", path = "../../embassy-executor", features = ["arch-cortex-m", "executor-thread", "defmt", "task-arena-size-4096", "integrated-timers"] }
 embassy-time = { version = "0.3.0", path = "../../embassy-time", features = ["defmt",  "defmt-timestamp-uptime"] }
 embassy-nrf = { version = "0.1.0", path = "../../embassy-nrf", features = ["defmt",  "nrf51", "time-driver-rtc1", "unstable-pac"] }
 embedded-io-async = { version = "0.6.1", features = ["defmt-03"] }