diff --git a/library/CMakeLists.txt b/library/CMakeLists.txt
index 5c5ddc2..1d4d371 100644
--- a/library/CMakeLists.txt
+++ b/library/CMakeLists.txt
@@ -157,7 +157,7 @@
 
 if(USE_SHARED_MBEDTLS_LIBRARY)
     add_library(mbedcrypto SHARED ${src_crypto})
-    set_target_properties(mbedcrypto PROPERTIES VERSION 2.17.0 SOVERSION 3)
+    set_target_properties(mbedcrypto PROPERTIES VERSION 2.20.0 SOVERSION 4)
     target_link_libraries(mbedcrypto ${libs})
     target_include_directories(mbedcrypto
         PUBLIC ${MBEDTLS_DIR}/include/
diff --git a/library/Makefile b/library/Makefile
index 6aeb95f..ca063f4 100644
--- a/library/Makefile
+++ b/library/Makefile
@@ -36,7 +36,7 @@
 endif
 endif
 
-SOEXT_CRYPTO=so.3
+SOEXT_CRYPTO=so.4
 
 # Set AR_DASH= (empty string) to use an ar implementation that does not accept
 # the - prefix for command line options (e.g. llvm-ar)