diff --git a/module/camera/dependencies/zlib/CMakeLists.txt b/module/camera/dependencies/zlib/CMakeLists.txt
index dff34b05..47462385 100644
--- a/module/camera/dependencies/zlib/CMakeLists.txt
+++ b/module/camera/dependencies/zlib/CMakeLists.txt
@@ -11,7 +11,7 @@ set(ZLIB_COMMON_OPTIONS
 if (CMAKE_CROSSCOMPILING)
   get_property(ARCH GLOBAL PROPERTY arch)
   ExternalProject_Add(dep_zlib
-    URL https://www.zlib.net/zlib-1.2.12.tar.gz
+    URL https://www.zlib.net/zlib-1.2.13.tar.gz
     CMAKE_ARGS
       -DCMAKE_TOOLCHAIN_FILE=${CMAKE_TOOLCHAIN_FILE}
       ${ZLIB_COMMON_OPTIONS}
@@ -19,7 +19,7 @@ if (CMAKE_CROSSCOMPILING)
   )
 else()
   ExternalProject_Add(dep_zlib
-    URL https://www.zlib.net/zlib-1.2.12.tar.gz
+    URL https://www.zlib.net/zlib-1.2.13.tar.gz
     CMAKE_ARGS
       ${ZLIB_COMMON_OPTIONS}
     INSTALL_COMMAND make install
@@ -36,4 +36,4 @@ target_include_directories(zlib_wrapper INTERFACE ${ZLIB_INCLUDE_DIR})
 # z
 add_library(z_wrapper INTERFACE)
 add_dependencies(z_wrapper zlib_wrapper)
-target_link_libraries(z_wrapper INTERFACE zlib_wrapper z)
\ No newline at end of file
+target_link_libraries(z_wrapper INTERFACE zlib_wrapper z)
diff --git a/module/core/src/device/wombat/wombat_device.cpp b/module/core/src/device/wombat/wombat_device.cpp
index 76ef9546..291eb784 100644
--- a/module/core/src/device/wombat/wombat_device.cpp
+++ b/module/core/src/device/wombat/wombat_device.cpp
@@ -162,7 +162,7 @@ class WombatDevice : public kipr::core::Device
       return false;
     }
 
-    if (read_buffer[0] != 'J')
+    if (read_buffer && read_buffer[0] != 'J')
     {
       logger.error() << "DMA de-synchronized";
       return false;