diff --git a/CHANGELOG b/CHANGELOG
index 5057980a6..57fc8a260 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,7 @@
+2018-12-18
+    - 1.17.9
+    - [BUGFIX] Engine: reduce minumum batch size from 256 to 4
+
 2018-12-10
     - 1.17.8
     - [BUGFIX] Fix compilation on FreeBSD and 32-bit Linux
diff --git a/include/lsquic.h b/include/lsquic.h
index 01d11ccaf..b66f3e24c 100644
--- a/include/lsquic.h
+++ b/include/lsquic.h
@@ -25,7 +25,7 @@ extern "C" {
 
 #define LSQUIC_MAJOR_VERSION 1
 #define LSQUIC_MINOR_VERSION 17
-#define LSQUIC_PATCH_VERSION 8
+#define LSQUIC_PATCH_VERSION 9
 
 /**
  * Engine flags:
diff --git a/src/liblsquic/lsquic_engine.c b/src/liblsquic/lsquic_engine.c
index d7bddb82d..4e2bb0869 100644
--- a/src/liblsquic/lsquic_engine.c
+++ b/src/liblsquic/lsquic_engine.c
@@ -66,8 +66,8 @@
 
 /* The batch of outgoing packets grows and shrinks dynamically */
 #define MAX_OUT_BATCH_SIZE 1024
-#define MIN_OUT_BATCH_SIZE 256
-#define INITIAL_OUT_BATCH_SIZE 512
+#define MIN_OUT_BATCH_SIZE 4
+#define INITIAL_OUT_BATCH_SIZE 32
 
 struct out_batch
 {