diff --git a/include/blt/parse/argparse.h b/include/blt/parse/argparse.h
index 6636514..0b16f48 100644
--- a/include/blt/parse/argparse.h
+++ b/include/blt/parse/argparse.h
@@ -20,7 +20,7 @@
 
 namespace blt
 {
-    typedef std::variant<std::string, bool, int32_t> arg_data_internal_t;
+    typedef std::variant<std::string, bool, int32_t, float, double, int64_t> arg_data_internal_t;
     typedef std::vector<arg_data_internal_t> arg_data_vec_t;
     typedef std::variant<arg_data_internal_t, arg_data_vec_t> arg_data_t;
     
diff --git a/libraries/parallel-hashmap b/libraries/parallel-hashmap
index 65775fa..67c2461 160000
--- a/libraries/parallel-hashmap
+++ b/libraries/parallel-hashmap
@@ -1 +1 @@
-Subproject commit 65775fa09fecaa65d0b0022ab6bf091c0e509445
+Subproject commit 67c24619e4f5ab2097b74cc397732c17a25d6944
diff --git a/src/blt/parse/argparse.cpp b/src/blt/parse/argparse.cpp
index 92daea9..ded24bb 100644
--- a/src/blt/parse/argparse.cpp
+++ b/src/blt/parse/argparse.cpp
@@ -106,14 +106,23 @@ namespace blt
     std::string to_string(const arg_data_internal_t& v)
     {
         return std::visit(blt::lambda_visitor{
-                [&](const std::string& str) {
+                [](const std::string& str) {
                     return str;
                 },
-                [&](bool b) {
+                [](bool b) {
                     return std::string(b ? "True" : "False");
                 },
-                [&](int32_t i) {
+                [](int32_t i) {
                     return std::to_string(i);
+                },
+                [](float f){
+                    return std::to_string(f);
+                },
+                [](int64_t i) {
+                    return std::to_string(i);
+                },
+                [](double f){
+                    return std::to_string(f);
                 }
         }, v);
     }