diff --git a/CHANGELOG.md b/CHANGELOG.md
index a2468fb5..22aa4889 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,7 @@ HEAD
 * Allow mixed configuration in compilation units (issue #809)
 * Fixed object keys not being duplicated
 * `JsonPair::key()` now returns a `JsonKey`
+* Increased the default capacity of `DynamicJsonDocument`
 
 v6.4.0-beta (2018-09-11)
 -----------
diff --git a/src/ArduinoJson/Configuration.hpp b/src/ArduinoJson/Configuration.hpp
index 914dd1de..f8d2bd97 100644
--- a/src/ArduinoJson/Configuration.hpp
+++ b/src/ArduinoJson/Configuration.hpp
@@ -53,6 +53,11 @@
 #define ARDUINOJSON_DEFAULT_NESTING_LIMIT 10
 #endif
 
+// Default capacity for DynamicJsonDocument
+#ifndef ARDUINOJSON_DEFAULT_POOL_SIZE
+#define ARDUINOJSON_DEFAULT_POOL_SIZE 1024
+#endif
+
 #else  // ARDUINOJSON_EMBEDDED_MODE
 
 // On a computer we have plenty of memory so we can use doubles
@@ -84,6 +89,11 @@
 #define ARDUINOJSON_DEFAULT_NESTING_LIMIT 50
 #endif
 
+// Default capacity for DynamicJsonDocument
+#ifndef ARDUINOJSON_DEFAULT_POOL_SIZE
+#define ARDUINOJSON_DEFAULT_POOL_SIZE 16384
+#endif
+
 #endif  // ARDUINOJSON_EMBEDDED_MODE
 
 #ifdef ARDUINO
diff --git a/src/ArduinoJson/Memory/DynamicMemoryPool.hpp b/src/ArduinoJson/Memory/DynamicMemoryPool.hpp
index 1bda9cb5..e4f2c3ff 100644
--- a/src/ArduinoJson/Memory/DynamicMemoryPool.hpp
+++ b/src/ArduinoJson/Memory/DynamicMemoryPool.hpp
@@ -45,7 +45,7 @@ class DynamicMemoryPoolBase : public MemoryPool {
  public:
   enum { EmptyBlockSize = sizeof(EmptyBlock) };
 
-  DynamicMemoryPoolBase(size_t initialSize = 256)
+  DynamicMemoryPoolBase(size_t initialSize = ARDUINOJSON_DEFAULT_POOL_SIZE)
       : _head(NULL), _nextBlockCapacity(initialSize) {}
 
   ~DynamicMemoryPoolBase() {