diff --git a/docs/signatures.md b/docs/signatures.md
index f5daf3c..b2fe262 100644
--- a/docs/signatures.md
+++ b/docs/signatures.md
@@ -6,6 +6,12 @@ GLMS_AST_TYPE_VEC3 unit(GLMS_AST_TYPE_VEC3)
 
 ```
 
+### ceil
+```
+GLMS_AST_TYPE_NUMBER ceil(GLMS_AST_TYPE_NUMBER)
+
+```
+
 ### cantor
 ```
 GLMS_AST_TYPE_NUMBER cantor(GLMS_AST_TYPE_NUMBER, GLMS_AST_TYPE_NUMBER)
@@ -149,6 +155,18 @@ GLMS_AST_TYPE_NUMBER cos(GLMS_AST_TYPE_NUMBER)
 
 ```
 
+### floor
+```
+GLMS_AST_TYPE_NUMBER floor(GLMS_AST_TYPE_NUMBER)
+
+```
+
+### round
+```
+GLMS_AST_TYPE_NUMBER round(GLMS_AST_TYPE_NUMBER)
+
+```
+
 ### quatFor
 ```
 GLMS_AST_TYPE_VEC4 quatFor(GLMS_AST_TYPE_VEC4 dir, GLMS_AST_TYPE_VEC4 up)
diff --git a/include/glms/version.h b/include/glms/version.h
index 99cfca7..6174db4 100644
--- a/include/glms/version.h
+++ b/include/glms/version.h
@@ -3,8 +3,8 @@
 
 #define GLMS_VERSION_MAJOR 0
 #define GLMS_VERSION_MINOR 0
-#define GLMS_VERSION_PATCH 3
+#define GLMS_VERSION_PATCH 4
 
-#define GLMS_VERSION_STRING "0.0.3"
+#define GLMS_VERSION_STRING "0.0.4"
 
 #endif
diff --git a/src/builtin.c b/src/builtin.c
index 5a38e7d..63f790c 100644
--- a/src/builtin.c
+++ b/src/builtin.c
@@ -285,6 +285,39 @@ int glms_fptr_abs(GLMSEval* eval, GLMSAST* ast, GLMSASTBuffer* args,
   return 1;
 }
 
+int glms_fptr_floor(GLMSEval* eval, GLMSAST* ast, GLMSASTBuffer* args,
+                  GLMSStack* stack, GLMSAST* out) {
+  if (args->length <= 0) return 0;
+
+  GLMSAST value = glms_eval(eval, args->items[0], stack);
+
+  *out = (GLMSAST){.type = GLMS_AST_TYPE_NUMBER, .as.number.value = floorf(glms_ast_number(value))};
+
+  return 1;
+}
+
+int glms_fptr_ceil(GLMSEval* eval, GLMSAST* ast, GLMSASTBuffer* args,
+                  GLMSStack* stack, GLMSAST* out) {
+  if (args->length <= 0) return 0;
+
+  GLMSAST value = glms_eval(eval, args->items[0], stack);
+
+  *out = (GLMSAST){.type = GLMS_AST_TYPE_NUMBER, .as.number.value = ceilf(glms_ast_number(value))};
+
+  return 1;
+}
+
+int glms_fptr_round(GLMSEval* eval, GLMSAST* ast, GLMSASTBuffer* args,
+                  GLMSStack* stack, GLMSAST* out) {
+  if (args->length <= 0) return 0;
+
+  GLMSAST value = glms_eval(eval, args->items[0], stack);
+
+  *out = (GLMSAST){.type = GLMS_AST_TYPE_NUMBER, .as.number.value = roundf(glms_ast_number(value))};
+
+  return 1;
+}
+
 int glms_fptr_sin(GLMSEval* eval, GLMSAST* ast, GLMSASTBuffer* args,
                   GLMSStack* stack, GLMSAST* out) {
   if (args->length <= 0) return 0;
@@ -826,6 +859,30 @@ void glms_builtin_init(GLMSEnv* env) {
           .args = (GLMSType[]){(GLMSType){GLMS_AST_TYPE_NUMBER}},
           .args_length = 1});
 
+  glms_env_register_function(env, "floor", glms_fptr_floor);
+  glms_env_register_function_signature(
+      env, 0, "floor",
+      (GLMSFunctionSignature){
+          .return_type = (GLMSType){GLMS_AST_TYPE_NUMBER},
+          .args = (GLMSType[]){(GLMSType){GLMS_AST_TYPE_NUMBER}},
+          .args_length = 1});
+
+  glms_env_register_function(env, "ceil", glms_fptr_ceil);
+  glms_env_register_function_signature(
+      env, 0, "ceil",
+      (GLMSFunctionSignature){
+          .return_type = (GLMSType){GLMS_AST_TYPE_NUMBER},
+          .args = (GLMSType[]){(GLMSType){GLMS_AST_TYPE_NUMBER}},
+          .args_length = 1});
+
+  glms_env_register_function(env, "round", glms_fptr_round);
+  glms_env_register_function_signature(
+      env, 0, "round",
+      (GLMSFunctionSignature){
+          .return_type = (GLMSType){GLMS_AST_TYPE_NUMBER},
+          .args = (GLMSType[]){(GLMSType){GLMS_AST_TYPE_NUMBER}},
+          .args_length = 1});
+
   glms_env_register_function(env, "atan", glms_fptr_atan);
   glms_env_register_function_signature(
       env, 0, "atan",