diff --git a/library/CMakeLists.txt b/library/CMakeLists.txt
index f896850..451dbfd 100644
--- a/library/CMakeLists.txt
+++ b/library/CMakeLists.txt
@@ -171,7 +171,7 @@
     add_library(${mbedx509_target} SHARED ${src_x509})
     set_base_compile_options(${mbedx509_target})
     target_compile_options(${mbedx509_target} PRIVATE ${LIBS_C_FLAGS})
-    set_target_properties(${mbedx509_target} PROPERTIES VERSION 4.0.0 SOVERSION 7)
+    set_target_properties(${mbedx509_target} PROPERTIES VERSION 4.0.0 SOVERSION 8)
     target_link_libraries(${mbedx509_target} PUBLIC ${libs} ${tfpsacrypto_target})
 
     add_library(${mbedtls_target} SHARED ${src_tls})
diff --git a/library/Makefile b/library/Makefile
index 2f695c6..a880f26 100644
--- a/library/Makefile
+++ b/library/Makefile
@@ -82,7 +82,7 @@
 endif
 
 SOEXT_TLS?=so.21
-SOEXT_X509?=so.7
+SOEXT_X509?=so.8
 SOEXT_CRYPTO?=so.16
 
 # Set AR_DASH= (empty string) to use an ar implementation that does not accept