diff --git a/CHANGELOG.md b/CHANGELOG.md
index 28c250e2..f1625b48 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,13 @@
+1.5.4
+=====
+Fixes:
+------
+* Fix build with GCC 7.1.1 and optimization level `-O2` (bfbd8fe0d85f1dd21e508748fc10fc4c27cc51be)
+
+Other Changes:
+--------------
+* Update [Unity](https://github.com/ThrowTheSwitch/Unity) to 3b69beaa58efc41bbbef70a32a46893cae02719d
+
 1.5.3
 =====
 Fixes:
diff --git a/CMakeLists.txt b/CMakeLists.txt
index b1b705d8..d953ed83 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -7,7 +7,7 @@ project(cJSON C)
 
 set(PROJECT_VERSION_MAJOR 1)
 set(PROJECT_VERSION_MINOR 5)
-set(PROJECT_VERSION_PATCH 3)
+set(PROJECT_VERSION_PATCH 4)
 set(CJSON_VERSION_SO 1)
 set(CJSON_UTILS_VERSION_SO 1)
 set(PROJECT_VERSION "${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}.${PROJECT_VERSION_PATCH}")
diff --git a/Makefile b/Makefile
index b30ab88d..be31b041 100644
--- a/Makefile
+++ b/Makefile
@@ -8,7 +8,7 @@ CJSON_TEST_SRC = cJSON.c test.c
 
 LDLIBS = -lm
 
-LIBVERSION = 1.5.3
+LIBVERSION = 1.5.4
 CJSON_SOVERSION = 1
 UTILS_SOVERSION = 1
 
diff --git a/cJSON.c b/cJSON.c
index 2494cd96..0722c8e1 100644
--- a/cJSON.c
+++ b/cJSON.c
@@ -58,7 +58,7 @@ CJSON_PUBLIC(const char *) cJSON_GetErrorPtr(void)
 }
 
 /* This is a safeguard to prevent copy-pasters from using incompatible C and header files */
-#if (CJSON_VERSION_MAJOR != 1) || (CJSON_VERSION_MINOR != 5) || (CJSON_VERSION_PATCH != 3)
+#if (CJSON_VERSION_MAJOR != 1) || (CJSON_VERSION_MINOR != 5) || (CJSON_VERSION_PATCH != 4)
     #error cJSON.h and cJSON.c have different versions. Make sure that both have the same.
 #endif
 
diff --git a/cJSON.h b/cJSON.h
index fe622eec..eb16c1e9 100644
--- a/cJSON.h
+++ b/cJSON.h
@@ -31,7 +31,7 @@ extern "C"
 /* project version */
 #define CJSON_VERSION_MAJOR 1
 #define CJSON_VERSION_MINOR 5
-#define CJSON_VERSION_PATCH 3
+#define CJSON_VERSION_PATCH 4
 
 #include <stddef.h>