Build failed on Ubuntu 18.04

[c0g4ih4l4n]

gcc -o jwtcrack main.o base64.o -lssl -lcrypto -lpthread
/usr/bin/ld: base64.o: relocation R_X86_64_32S against `.rodata' can not be used when making a PIE object; recompile with -fPIC
/usr/bin/ld: final link failed: Nonrepresentable section on output
collect2: error: ld returned 1 exit status
Makefile:16: recipe for target 'jwtcrack' failed
make: *** [jwtcrack] Error 1

I have this error when build with Ubuntu 18.04, please help