diff --git a/ARM.CMSIS.pdsc b/ARM.CMSIS.pdsc
index 3bce3c5..26ec04a 100644
--- a/ARM.CMSIS.pdsc
+++ b/ARM.CMSIS.pdsc
@@ -11,6 +11,7 @@
     <release version="5.2.1-dev1">
       Active development...
       CMSIS-RTOS2:
+        - RTX 5.3.0 (see revision history for details)
         - OS Tick API 1.0.1
     </release>
     <release version="5.2.0" date="2017-11-16">
@@ -2644,7 +2645,7 @@
     </component>
 
     <!-- CMSIS-RTOS Keil RTX5 component -->
-    <component Cclass="CMSIS" Cgroup="RTOS" Csub="Keil RTX5" Cversion="5.2.3" Capiversion="1.0.0" condition="RTOS RTX5">
+    <component Cclass="CMSIS" Cgroup="RTOS" Csub="Keil RTX5" Cversion="5.3.0" Capiversion="1.0.0" condition="RTOS RTX5">
       <description>CMSIS-RTOS RTX5 implementation for Cortex-M, SC000, and SC300</description>
       <RTE_Components_h>
         <!-- the following content goes into file 'RTE_Components.h' -->
@@ -2660,7 +2661,7 @@
     </component>
 
     <!-- CMSIS-RTOS2 Keil RTX5 component -->
-    <component Cclass="CMSIS" Cgroup="RTOS2" Csub="Keil RTX5" Cvariant="Library" Cversion="5.2.3" Capiversion="2.1.2" condition="RTOS2 RTX5 Lib">
+    <component Cclass="CMSIS" Cgroup="RTOS2" Csub="Keil RTX5" Cvariant="Library" Cversion="5.3.0" Capiversion="2.1.2" condition="RTOS2 RTX5 Lib">
       <description>CMSIS-RTOS2 RTX5 for Cortex-M, SC000, C300 and ARMv8-M (Library)</description>
       <RTE_Components_h>
         <!-- the following content goes into file 'RTE_Components.h' -->
@@ -2675,7 +2676,7 @@
         <file category="header" name="CMSIS/RTOS2/RTX/Include/rtx_os.h"/>
 
         <!-- RTX configuration -->
-        <file category="header" attr="config"   name="CMSIS/RTOS2/RTX/Config/RTX_Config.h"  version="5.2.0"/>
+        <file category="header" attr="config"   name="CMSIS/RTOS2/RTX/Config/RTX_Config.h"  version="5.3.0"/>
         <file category="source" attr="config"   name="CMSIS/RTOS2/RTX/Config/RTX_Config.c"  version="5.1.0"/>
 
         <!-- RTX templates -->
@@ -2729,7 +2730,7 @@
         <file category="library" condition="CM7_FP_LE_IAR"        name="CMSIS/RTOS2/RTX/Library/IAR/RTX_CM4F.a"     src="CMSIS/RTOS2/RTX/Source"/>
       </files>
     </component>
-    <component Cclass="CMSIS" Cgroup="RTOS2" Csub="Keil RTX5" Cvariant="Library_NS" Cversion="5.2.3" Capiversion="2.1.2" condition="RTOS2 RTX5 NS">
+    <component Cclass="CMSIS" Cgroup="RTOS2" Csub="Keil RTX5" Cvariant="Library_NS" Cversion="5.3.0" Capiversion="2.1.2" condition="RTOS2 RTX5 NS">
       <description>CMSIS-RTOS2 RTX5 for ARMv8-M Non-Secure Domain (Library)</description>
       <RTE_Components_h>
         <!-- the following content goes into file 'RTE_Components.h' -->
@@ -2745,7 +2746,7 @@
         <file category="header" name="CMSIS/RTOS2/RTX/Include/rtx_os.h"/>
 
         <!-- RTX configuration -->
-        <file category="header" attr="config"   name="CMSIS/RTOS2/RTX/Config/RTX_Config.h"  version="5.2.0"/>
+        <file category="header" attr="config"   name="CMSIS/RTOS2/RTX/Config/RTX_Config.h"  version="5.3.0"/>
         <file category="source" attr="config"   name="CMSIS/RTOS2/RTX/Config/RTX_Config.c"  version="5.1.0"/>
 
         <!-- RTX templates -->
@@ -2780,7 +2781,7 @@
         <file category="library" condition="ARMv8MML_FP_LE_GCC"   name="CMSIS/RTOS2/RTX/Library/GCC/libRTX_V8MMFN.a" src="CMSIS/RTOS2/RTX/Source"/>
       </files>
     </component>
-    <component Cclass="CMSIS" Cgroup="RTOS2" Csub="Keil RTX5" Cvariant="Source" Cversion="5.2.3" Capiversion="2.1.2" condition="RTOS2 RTX5">
+    <component Cclass="CMSIS" Cgroup="RTOS2" Csub="Keil RTX5" Cvariant="Source" Cversion="5.3.0" Capiversion="2.1.2" condition="RTOS2 RTX5">
       <description>CMSIS-RTOS2 RTX5 for Cortex-M, SC000, C300 and ARMv8-M (Source)</description>
       <RTE_Components_h>
         <!-- the following content goes into file 'RTE_Components.h' -->
@@ -2796,7 +2797,7 @@
         <file category="header" name="CMSIS/RTOS2/RTX/Include/rtx_os.h"/>
 
         <!-- RTX configuration -->
-        <file category="header" attr="config"   name="CMSIS/RTOS2/RTX/Config/RTX_Config.h"  version="5.2.0"/>
+        <file category="header" attr="config"   name="CMSIS/RTOS2/RTX/Config/RTX_Config.h"  version="5.3.0"/>
         <file category="source" attr="config"   name="CMSIS/RTOS2/RTX/Config/RTX_Config.c"  version="5.1.0"/>
 
         <!-- RTX templates -->
@@ -2869,7 +2870,7 @@
         <file category="source" name="CMSIS/RTOS2/Source/os_systick.c"/>
       </files>
     </component>
-    <component Cclass="CMSIS" Cgroup="RTOS2" Csub="Keil RTX5" Cvariant="Source" Cversion="5.2.3" Capiversion="2.1.2" condition="RTOS2 RTX5 v7-A">
+    <component Cclass="CMSIS" Cgroup="RTOS2" Csub="Keil RTX5" Cvariant="Source" Cversion="5.3.0" Capiversion="2.1.2" condition="RTOS2 RTX5 v7-A">
       <description>CMSIS-RTOS2 RTX5 for ARMv7-A (Source)</description>
       <RTE_Components_h>
         <!-- the following content goes into file 'RTE_Components.h' -->
@@ -2885,7 +2886,7 @@
         <file category="header" name="CMSIS/RTOS2/RTX/Include/rtx_os.h"/>
 
         <!-- RTX configuration -->
-        <file category="header" attr="config"   name="CMSIS/RTOS2/RTX/Config/RTX_Config.h"  version="5.2.0"/>
+        <file category="header" attr="config"   name="CMSIS/RTOS2/RTX/Config/RTX_Config.h"  version="5.3.0"/>
         <file category="source" attr="config"   name="CMSIS/RTOS2/RTX/Config/RTX_Config.c"  version="5.1.0"/>
 
         <file category="source" attr="config"   name="CMSIS/RTOS2/RTX/Config/handlers.c"    version="5.1.0"/>
@@ -2926,7 +2927,7 @@
         <file category="source" name="CMSIS/RTOS2/RTX/Source/IAR/irq_ca.s"          condition="CA_IAR"/>
       </files>
     </component>
-    <component Cclass="CMSIS" Cgroup="RTOS2" Csub="Keil RTX5" Cvariant="Source_NS" Cversion="5.2.3" Capiversion="2.1.2" condition="RTOS2 RTX5 NS">
+    <component Cclass="CMSIS" Cgroup="RTOS2" Csub="Keil RTX5" Cvariant="Source_NS" Cversion="5.3.0" Capiversion="2.1.2" condition="RTOS2 RTX5 NS">
       <description>CMSIS-RTOS2 RTX5 for ARMv8-M Non-Secure Domain (Source)</description>
       <RTE_Components_h>
         <!-- the following content goes into file 'RTE_Components.h' -->
@@ -2943,7 +2944,7 @@
         <file category="header" name="CMSIS/RTOS2/RTX/Include/rtx_os.h"/>
 
         <!-- RTX configuration -->
-        <file category="header" attr="config"   name="CMSIS/RTOS2/RTX/Config/RTX_Config.h"  version="5.2.0"/>
+        <file category="header" attr="config"   name="CMSIS/RTOS2/RTX/Config/RTX_Config.h"  version="5.3.0"/>
         <file category="source" attr="config"   name="CMSIS/RTOS2/RTX/Config/RTX_Config.c"  version="5.1.0"/>
 
         <!-- RTX templates -->