diff --git a/CMakeLists.txt b/CMakeLists.txt
index f081c0b7..0e5d6fa0 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -67,12 +67,12 @@ set(WEB_RESOURCES
 )
 
 find_package(PkgConfig REQUIRED)
-pkg_check_modules(CURL REQUIRED libcurl)
-pkg_check_modules(JANSSON REQUIRED jansson)
+pkg_check_modules(CURL REQUIRED libcurl>=7.12.1)
+pkg_check_modules(JANSSON REQUIRED jansson>=2.7)
 if(ENABLE_API)
-pkg_check_modules(MICROHTTPD REQUIRED libmicrohttpd)
+pkg_check_modules(MICROHTTPD REQUIRED libmicrohttpd>=0.9.71)
 endif()
-pkg_check_modules(SODIUM REQUIRED libsodium)
+pkg_check_modules(SODIUM REQUIRED libsodium>=1.0.7)
 find_package(Threads REQUIRED)
 
 include(CheckFunctionExists)
@@ -132,6 +132,7 @@ if(HAVE_EPOLL_WAIT)
 	set(EPOLL_SHIM_INCLUDE_DIRS "")
 	set(EPOLL_SHIM_LIBRARIES "")
 else()
+	# epoll-shim does not publish a version in its pkg-config metadata; its first tagged release provides all APIs used here.
 	pkg_check_modules(EPOLL_SHIM REQUIRED epoll-shim)
 endif()
 
diff --git a/src/datum_conf_tests.c b/src/datum_conf_tests.c
index e9547b79..14925ffe 100644
--- a/src/datum_conf_tests.c
+++ b/src/datum_conf_tests.c
@@ -195,7 +195,7 @@ void datum_conf_test_parse_username_mods__(const unsigned int code_line, json_t
 
 void datum_conf_test_parse_username_mods_(const unsigned int code_line, const char * const input, const int expected_ret, const struct datum_test_username_mods *expected_umods) {
 	json_error_t err;
-	json_t * const j_input = JSON_LOADS(input, &err);
+	json_t * const j_input = json_loads(input, 0, &err);
 	assert(j_input);
 	datum_conf_test_parse_username_mods__(code_line, j_input, input, expected_ret, expected_umods);
 }
diff --git a/src/datum_jsonrpc.c b/src/datum_jsonrpc.c
index 87ce13cc..0e9ac4fa 100644
--- a/src/datum_jsonrpc.c
+++ b/src/datum_jsonrpc.c
@@ -191,7 +191,7 @@ json_t *json_rpc_call_full(CURL *curl, const char *url, const char *userpass, co
 		goto err_out;
 	}
 	
-	val = JSON_LOADS(all_data.buf, &err);
+	val = json_loads(all_data.buf, 0, &err);
 	if (!val) {
 		DLOG_DEBUG("JSON decode failed(%d): %s", err.line, err.text);
 		goto err_out;
diff --git a/src/datum_jsonrpc.h b/src/datum_jsonrpc.h
index b06fd098..e78dccf4 100644
--- a/src/datum_jsonrpc.h
+++ b/src/datum_jsonrpc.h
@@ -42,12 +42,7 @@
 #include "datum_conf.h"
 
 #ifndef JSON_INTEGER_IS_LONG_LONG
-#       error "Jansson 2.0 with long long support required!"
-#endif
-#if JANSSON_MAJOR_VERSION >= 2
-#define JSON_LOADS(str, err_ptr) json_loads((str), 0, (err_ptr))
-#else
-#define JSON_LOADS(str, err_ptr) json_loads((str), (err_ptr))
+	#error "Jansson with long long support required!"
 #endif
 
 // Legacy functions
diff --git a/src/datum_stratum_tests.c b/src/datum_stratum_tests.c
index ebcf7af0..3a9e9d0b 100644
--- a/src/datum_stratum_tests.c
+++ b/src/datum_stratum_tests.c
@@ -550,7 +550,7 @@ static void datum_stratum_minimum_difficulty_configure_tests(void) {
 void datum_stratum_mod_username_tests() {
 	const char * const s_umods = "{\"x\":{\"addrA\": 0.3}, \"abc\":{\"addrB\":0.3,\"addrC\":0.3},\":)\":{\"\":0.5},\"a.c\":{\"addrD\":1.0}}";
 	json_error_t err;
-	json_t * const j_umods = JSON_LOADS(s_umods, &err);
+	json_t * const j_umods = json_loads(s_umods, 0, &err);
 	assert(j_umods);
 	struct datum_username_mod *umods = NULL;
 	int ret = datum_config_parse_username_mods(&umods, j_umods, false);