diff --git a/Makefile.am b/Makefile.am
index d19a3dcc..8032eece 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -7,5 +7,5 @@ EXTRA_DIST	= sha256_generic.c
 
 minerd_SOURCES	= cpu-miner.c
 minerd_LDFLAGS	= -pthread
-minerd_LDADD	= @CRYPTO_LIBS@ @LIBCURL@ @JANSSON_LIBS@
+minerd_LDADD	= @LIBCURL@ @JANSSON_LIBS@
 
diff --git a/README b/README
index ce34b758..6d8caa79 100644
--- a/README
+++ b/README
@@ -6,7 +6,6 @@ License: GPLv2.  See COPYING for details.
 Dependencies:
 	libcurl			http://curl.haxx.se/libcurl/
 	jansson			http://www.digip.org/jansson/
-	OpenSSL libcrypto	http://www.openssl.org/
 
 Basic build instructions:
 	./autogen.sh
diff --git a/configure.ac b/configure.ac
index 1cb3712f..7ae98887 100644
--- a/configure.ac
+++ b/configure.ac
@@ -16,7 +16,6 @@ AM_PROG_CC_C_O
 dnl Checks for header files.
 AC_HEADER_STDC
 
-AC_CHECK_LIB(crypto, MD5_Init, CRYPTO_LIBS=-lcrypto)
 AC_CHECK_LIB(jansson, json_loads, JANSSON_LIBS=-ljansson)
 
 PKG_PROG_PKG_CONFIG()
@@ -24,7 +23,6 @@ PKG_PROG_PKG_CONFIG()
 LIBCURL_CHECK_CONFIG(, 7.10.1, ,
   [AC_MSG_ERROR([Missing required libcurl >= 7.10.1])])
 
-AC_SUBST(CRYPTO_LIBS)
 AC_SUBST(JANSSON_LIBS)
 
 AC_CONFIG_FILES([
diff --git a/cpu-miner.c b/cpu-miner.c
index df1da5e9..4985a073 100644
--- a/cpu-miner.c
+++ b/cpu-miner.c
@@ -21,9 +21,10 @@
 #include <argp.h>
 #include <jansson.h>
 #include <curl/curl.h>
-#include <openssl/bn.h>
 
-#define PROGRAM_NAME "minerd"
+#define PROGRAM_NAME		"minerd"
+#define DEF_RPC_URL		"http://127.0.0.1:8332/"
+#define DEF_RPC_USERPASS	"rpcuser:rpcpass"
 
 #include "sha256_generic.c"
 
@@ -39,8 +40,8 @@ static const bool opt_time = true;
 static int opt_n_threads = 1;
 static pthread_mutex_t stats_mutex = PTHREAD_MUTEX_INITIALIZER;
 static uint64_t hash_ctr;
-static char *rpc_url = "http://127.0.0.1:8332/";
-static char *userpass = "rpcuser:rpcpass";
+static char *rpc_url = DEF_RPC_URL;
+static char *userpass = DEF_RPC_USERPASS;
 
 
 static struct argp_option options[] = {
@@ -55,11 +56,11 @@ static struct argp_option options[] = {
 
 	{ "url", 1001, "URL", 0,
 	  "URL for bitcoin JSON-RPC server "
-	  "(default: http://127.0.0.1:8332/)" },
+	  "(default: " DEF_RPC_URL ")" },
 
 	{ "userpass", 1002, "USER:PASS", 0,
 	  "Username:Password pair for bitcoin JSON-RPC server "
-	  "(default: rpcuser:rpcpass)" },
+	  "(default: " DEF_RPC_USERPASS ")" },
 	{ }
 };
 
@@ -85,7 +86,7 @@ struct work {
 	unsigned char	data[128];
 	unsigned char	hash[32];
 	unsigned char	hash1[64];
-	BIGNUM		*target;
+	unsigned char	target[32];
 };
 
 static void databuf_free(struct data_buffer *db)
@@ -286,9 +287,6 @@ static void work_free(struct work *work)
 	if (!work)
 		return;
 
-	if (work->target)
-		BN_free(work->target);
-
 	free(work);
 }
 
@@ -316,8 +314,7 @@ static struct work *work_decode(const json_t *val)
 		goto err_out;
 	}
 
-	if (!BN_hex2bn(&work->target,
-		json_string_value(json_object_get(val, "target")))) {
+	if (!jobj_binary(val, "target", work->target, sizeof(work->target))) {
 		fprintf(stderr, "JSON inval target\n");
 		goto err_out;
 	}