diff --git a/CMakeLists.txt b/CMakeLists.txt
index 33a993b..76da0bf 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -27,7 +27,7 @@ macro(compile_options target_name)
     sanitizers(${target_name})
 endmacro()
 
-project(blt-gp VERSION 0.4.2)
+project(blt-gp VERSION 0.4.3)
 
 include(CTest)
 
diff --git a/include/blt/gp/program.h b/include/blt/gp/program.h
index 5caa1e0..a58ba11 100644
--- a/include/blt/gp/program.h
+++ b/include/blt/gp/program.h
@@ -292,15 +292,15 @@ namespace blt::gp
 		})
 		{
 			create_threads();
-			selection_probabilities.update(config);
+			set_config(config);
 		}
 
 		explicit gp_program(blt::u64 seed, const prog_config_t& config): seed_func([seed] {
 			return seed;
-		}), config(config)
+		})
 		{
 			create_threads();
-			selection_probabilities.update(config);
+			set_config(config);
 		}
 
 		/**
@@ -311,13 +311,13 @@ namespace blt::gp
 		explicit gp_program(std::function<blt::u64()> seed_func): seed_func(std::move(seed_func))
 		{
 			create_threads();
-			selection_probabilities.update(config);
+			set_config(config);
 		}
 
-		explicit gp_program(std::function<blt::u64()> seed_func, const prog_config_t& config): seed_func(std::move(seed_func)), config(config)
+		explicit gp_program(std::function<blt::u64()> seed_func, const prog_config_t& config): seed_func(std::move(seed_func))
 		{
 			create_threads();
-			selection_probabilities.update(config);
+			set_config(config);
 		}
 
 		~gp_program()
@@ -680,6 +680,7 @@ namespace blt::gp
 		void set_config(const prog_config_t& config)
 		{
 			this->config = config;
+			selection_probabilities.update(this->config);
 		}
 
 		[[nodiscard]] type_provider& get_typesystem()