diff --git a/src/main.cpp b/src/main.cpp
index 3300d0a..73f7324 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -3,7 +3,6 @@
 #include <string>
 #include <stdexcept>
 #include <climits>
-#include <regex>
 #include <algorithm>
 #include <getopt.h>
 #include <libscnumerics.hpp>
@@ -23,18 +22,6 @@ int min_digits {0};
 int min_symbols {0};
 int min_special {0};
 
-void validate_range(const std::string& arg, int& min_val, int& max_val) {
-    std::regex pat {R"((\d+)(?:-(\d+))?)"};
-    std::smatch match;
-    if (std::regex_match(arg, match, pat)) {
-        min_val = std::atoi(match[1].str().c_str());
-        if (match.size() > 2) {
-            max_val = std::atoi(match[2].str().c_str());
-        }
-    }
-    throw std::runtime_error("invalid range");
-}
-
 int main(int argc, char* argv[]) {
     try {
         bool noflags {true};