diff --git a/pkg/cmab/config.go b/pkg/cmab/config.go
index 746b3f4f..ab4c8830 100644
--- a/pkg/cmab/config.go
+++ b/pkg/cmab/config.go
@@ -25,7 +25,7 @@ import (
 
 const (
 	// DefaultCacheSize is the default size for CMAB cache
-	DefaultCacheSize = 100
+	DefaultCacheSize = 1000
 	// DefaultCacheTTL is the default TTL for CMAB cache (30 minutes to match agent)
 	DefaultCacheTTL = 30 * time.Minute
 
diff --git a/pkg/cmab/config_test.go b/pkg/cmab/config_test.go
index bbc643d4..756e2fc7 100644
--- a/pkg/cmab/config_test.go
+++ b/pkg/cmab/config_test.go
@@ -35,7 +35,7 @@ func TestNewDefaultConfig(t *testing.T) {
 }
 
 func TestDefaultConstants(t *testing.T) {
-	assert.Equal(t, 100, DefaultCacheSize)
+	assert.Equal(t, 1000, DefaultCacheSize)
 	assert.Equal(t, 30*time.Minute, DefaultCacheTTL)
 	assert.Equal(t, 10*time.Second, DefaultHTTPTimeout)
 }