diff --git a/CMakeLists.txt b/CMakeLists.txt
index c4efa229d..c0e53cddc 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -168,29 +168,17 @@ else(USE_MKL)
 endif(USE_MKL)
 
 # Crypto
-find_package(Polarssl)
-if (POLARSSL_FOUND)
-  set(SEC_INCLUDE_DIRS "${POLARSSL_INCLUDE_DIRS}")
+find_package(MbedTLS REQUIRED)
+if (MBEDTLS_FOUND)
+  set(SEC_INCLUDE_DIRS "${MBEDTLS_INCLUDE_DIRS}")
   if(BUILD_STATIC)
-    set(SEC_LIBRARIES    "${POLARSSL_STATIC_LIBRARIES}")
+    set(SEC_LIBRARIES    "${MBEDTLS_STATIC_LIBRARIES}")
   else(BUILD_STATIC)
-    set(SEC_LIBRARIES    "${POLARSSL_LIBRARIES}")
+    set(SEC_LIBRARIES    "${MBEDTLS_LIBRARIES}")
   endif(BUILD_STATIC)
-  add_definitions(-DHAVE_POLARSSL)
-else(POLARSSL_FOUND)
-  find_package(MbedTLS REQUIRED)
-  if (MBEDTLS_FOUND)
-    set(SEC_INCLUDE_DIRS "${MBEDTLS_INCLUDE_DIRS}")
-    if(BUILD_STATIC)
-      set(SEC_LIBRARIES    "${MBEDTLS_STATIC_LIBRARIES}")
-    else(BUILD_STATIC)
-      set(SEC_LIBRARIES    "${MBEDTLS_LIBRARIES}")
-    endif(BUILD_STATIC)
-    add_definitions(-DHAVE_MBEDTLS)
-  else(MBEDTLS_FOUND)
-    message(FATAL_ERROR "Either PolarSSL or mbedTLS are required to build srsRAN")
-  endif (MBEDTLS_FOUND)
-endif(POLARSSL_FOUND)
+else(MBEDTLS_FOUND)
+  message(FATAL_ERROR "mbedTLS is required to build srsRAN")
+endif (MBEDTLS_FOUND)
 
 # Hard-SIM support
 if(ENABLE_HARDSIM)
diff --git a/cmake/modules/FindPolarssl.cmake b/cmake/modules/FindPolarssl.cmake
deleted file mode 100644
index 54fa89aa1..000000000
--- a/cmake/modules/FindPolarssl.cmake
+++ /dev/null
@@ -1,61 +0,0 @@
-#
-# Copyright 2013-2021 Software Radio Systems Limited
-#
-# By using this file, you agree to the terms and conditions set
-# forth in the LICENSE file which can be found at the top level of
-# the distribution.
-#
-
-# - Try to find polarssl
-#
-# Once done this will define
-#  POLARSSL_FOUND        - System has polarssl
-#  POLARSSL_INCLUDE_DIRS - The polarssl include directories
-#  POLARSSL_LIBRARIES    - The polarssl library
-
-FIND_PACKAGE(PkgConfig REQUIRED)
-PKG_CHECK_MODULES(PC_POLARSSL polarssl)
-
-FIND_PATH(
-    POLARSSL_INCLUDE_DIRS
-    NAMES polarssl/version.h
-    HINTS $ENV{POLARSSL_DIR}/include
-          ${PC_POLARSSL_INCLUDEDIR}
-          ${CMAKE_INSTALL_PREFIX}/include
-    PATHS /usr/local/include
-          /usr/include
-)
-
-FIND_LIBRARY(
-    POLARSSL_LIBRARIES
-    NAMES polarssl
-    HINTS $ENV{POLARSSL_DIR}/lib
-          ${PC_POLARSSL_LIBDIR}
-          ${CMAKE_INSTALL_PREFIX}/lib
-          ${CMAKE_INSTALL_PREFIX}/lib64
-    PATHS /usr/local/lib
-          /usr/local/lib64
-          /usr/lib
-          /usr/lib64
-)
-
-FIND_LIBRARY(
-    POLARSSL_STATIC_LIBRARIES
-    NAMES libpolarssl.a
-    HINTS $ENV{POLARSSL_DIR}/lib
-          ${PC_POLARSSL_LIBDIR}
-          ${CMAKE_INSTALL_PREFIX}/lib
-          ${CMAKE_INSTALL_PREFIX}/lib64
-    PATHS /usr/local/lib
-          /usr/local/lib64
-          /usr/lib
-          /usr/lib64
-)
-
-message(STATUS "POLARSSL LIBRARIES: " ${POLARSSL_LIBRARIES})
-message(STATUS "POLARSSL STATIC LIBRARIES: " ${POLARSSL_STATIC_LIBRARIES})
-message(STATUS "POLARSSL INCLUDE DIRS: " ${POLARSSL_INCLUDE_DIRS})
-
-INCLUDE(FindPackageHandleStandardArgs)
-FIND_PACKAGE_HANDLE_STANDARD_ARGS(Polarssl DEFAULT_MSG POLARSSL_LIBRARIES POLARSSL_INCLUDE_DIRS)
-MARK_AS_ADVANCED(POLARSSL_STATIC_LIBRARIES POLARSSL_LIBRARIES POLARSSL_INCLUDE_DIRS)
diff --git a/lib/include/srsran/common/ssl.h b/lib/include/srsran/common/ssl.h
index 38b6e6b5a..1d167c068 100644
--- a/lib/include/srsran/common/ssl.h
+++ b/lib/include/srsran/common/ssl.h
@@ -13,25 +13,6 @@
 #ifndef SRSRAN_SSL_H
 #define SRSRAN_SSL_H
 
-#ifdef HAVE_POLARSSL
-
-#include "polarssl/aes.h"
-#include "polarssl/sha256.h"
-
-inline void sha256(const unsigned char* key,
-                   size_t               keylen,
-                   const unsigned char* input,
-                   size_t               ilen,
-                   unsigned char        output[32],
-                   int                  is224)
-{
-  sha256_hmac(key, keylen, input, ilen, output, is224);
-}
-
-#endif // HAVE_POLARSSL
-
-#ifdef HAVE_MBEDTLS
-
 #include "mbedtls/aes.h"
 #include "mbedtls/md.h"
 
@@ -71,6 +52,4 @@ inline void sha256(const unsigned char* key,
   mbedtls_md_hmac(mbedtls_md_info_from_type(MBEDTLS_MD_SHA256), key, keylen, input, ilen, output);
 }
 
-#endif // HAVE_MBEDTLS
-
 #endif // SRSRAN_SSL_H
diff --git a/lib/src/common/security.cc b/lib/src/common/security.cc
index 82d7f0088..a37073e33 100644
--- a/lib/src/common/security.cc
+++ b/lib/src/common/security.cc
@@ -11,19 +11,13 @@
  */
 
 #include "srsran/common/security.h"
+#include "mbedtls/md5.h"
 #include "srsran/common/liblte_security.h"
 #include "srsran/common/s3g.h"
 #include "srsran/common/ssl.h"
 #include "srsran/config.h"
 #include <arpa/inet.h>
 
-#ifdef HAVE_MBEDTLS
-#include "mbedtls/md5.h"
-#endif
-#ifdef HAVE_POLARSSL
-#include "polarssl/md5.h"
-#endif
-
 #define FC_EPS_K_ASME_DERIVATION 0x10
 #define FC_EPS_K_ENB_DERIVATION 0x11
 #define FC_EPS_NH_DERIVATION 0x12
@@ -841,12 +835,7 @@ uint8_t security_128_eia3(const uint8_t* key,
 uint8_t security_md5(const uint8_t* input, size_t len, uint8_t* output)
 {
   memset(output, 0x00, 16);
-#ifdef HAVE_MBEDTLS
   mbedtls_md5(input, len, output);
-#endif // HAVE_MBEDTLS
-#ifdef HAVE_POLARSSL
-  md5(input, len, output);
-#endif
   return SRSRAN_SUCCESS;
 }