diff --git a/CMakeLists.txt b/CMakeLists.txt
index 484f30d..2dd503d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,5 +1,5 @@
 cmake_minimum_required(VERSION 3.25)
-project(blt-gp VERSION 0.1.8)
+project(blt-gp VERSION 0.1.9)
 
 include(CTest)
 
diff --git a/examples/symbolic_regression.cpp b/examples/symbolic_regression.cpp
index bf75a7e..c19c00b 100644
--- a/examples/symbolic_regression.cpp
+++ b/examples/symbolic_regression.cpp
@@ -31,6 +31,8 @@ struct context
 
 std::array<context, 200> fitness_cases;
 
+blt::gp::mutation_t mut;
+
 blt::gp::prog_config_t config = blt::gp::prog_config_t()
         .set_initial_min_tree_size(2)
         .set_initial_max_tree_size(6)
@@ -39,7 +41,7 @@ blt::gp::prog_config_t config = blt::gp::prog_config_t()
         .set_mutation_chance(0.1)
         .set_reproduction_chance(0)
         .set_max_generations(50)
-        .set_pop_size(50000)
+        .set_pop_size(5000)
         .set_thread_count(0);
 
 blt::gp::type_provider type_system;