diff --git a/Makefile b/Makefile
index e061ecda..2a249014 100644
--- a/Makefile
+++ b/Makefile
@@ -13,7 +13,7 @@ INDENT_CMD = indent -linux -l80 -i2 -nut
 # Libraries
 CYC_RT_LIB = libcyclone.a
 CYC_BN_LIB = libcyclonebn.a
-CYC_BN_LIB_SUBDIR = third-party/libtommath-1.1.0
+CYC_BN_LIB_SUBDIR = third-party/libtommath-1.2.0
 CYC_LIBS = $(CYC_RT_LIB) $(CYC_BN_LIB)
 
 # Directories