diff --git a/CanSpamReceiver.h b/CanSpamReceiver.h
index c2b8d3c..cfa7ac1 100644
--- a/CanSpamReceiver.h
+++ b/CanSpamReceiver.h
@@ -20,7 +20,7 @@ typedef struct {
 
     struct {
         osThreadId_t id;
-        uint32_t stack[512];
+        uint32_t stack[256];
         StaticTask_t controlBlock;
         osThreadAttr_t attr;
     } thread;
diff --git a/CanSpamTransmitter.h b/CanSpamTransmitter.h
index 82d4417..b70045d 100644
--- a/CanSpamTransmitter.h
+++ b/CanSpamTransmitter.h
@@ -55,7 +55,7 @@ typedef struct {
 
     struct {
         osThreadId_t id;
-        uint32_t stack[512];
+        uint32_t stack[256];
         StaticTask_t controlBlock;
         osThreadAttr_t attr;
     } thread;