diff --git a/kerep/src/Hashtable/Hashtable.c b/kerep/src/Hashtable/Hashtable.c
index 9c8fe15..69399ef 100644
--- a/kerep/src/Hashtable/Hashtable.c
+++ b/kerep/src/Hashtable/Hashtable.c
@@ -58,7 +58,7 @@ void Hashtable_expand(Hashtable* ht){
     ht->rows=newrows;
 }
 
-Autoarr(KVPair)* getrow(Hashtable* ht, char* key, bool can_expand){
+Autoarr(KVPair)* getrow(Hashtable* ht, const char* key, bool can_expand){
     u32 hash=hashs(hash_sdbm32, key);
     Autoarr(KVPair)* ar=ht->rows[hash%HT_HEIGHTS[ht->hein]];
     if(can_expand && Autoarr_length(ar)==Autoarr_max_length(ar))
@@ -69,7 +69,7 @@ Autoarr(KVPair)* getrow(Hashtable* ht, char* key, bool can_expand){
 
 /// @param key must be heap allocated
 /// Hashtable_free will free this pointer
-void Hashtable_add(Hashtable* ht, char* key, Unitype u){
+void Hashtable_add(Hashtable* ht, const char* key, Unitype u){
     KVPair p={ .key=key, .value=u };
     Autoarr_add(getrow(ht,key,true),p);
 }
@@ -81,7 +81,7 @@ void Hashtable_addMany(Hashtable* ht, KVPair* pair_array, u32 count){
 }
 
 // returns null or pointer to value in hashtable
-Unitype* Hashtable_getPtr(Hashtable* ht, char* key){
+Unitype* Hashtable_getPtr(Hashtable* ht, const char* key){
     Autoarr(KVPair)* ar=getrow(ht,key,false);
     u32 arlen=Autoarr_length(ar);
     for(u32 i=0;i<arlen;i++){
@@ -91,7 +91,7 @@ Unitype* Hashtable_getPtr(Hashtable* ht, char* key){
     return NULL;
 }
 
-Unitype Hashtable_get(Hashtable* ht, char* key){
+Unitype Hashtable_get(Hashtable* ht, const char* key){
     Autoarr(KVPair)* ar=getrow(ht,key,false);
     u32 arlen=Autoarr_length(ar);
     for(u32 i=0;i<arlen;i++){
@@ -101,14 +101,14 @@ Unitype Hashtable_get(Hashtable* ht, char* key){
     return UniNull;
 }
 
-bool Hashtable_tryGet(Hashtable* ht, char* key, Unitype* output){
+bool Hashtable_tryGet(Hashtable* ht, const char* key, Unitype* output){
     Unitype u=Hashtable_get(ht,key);
     *output=u;
     return !Unitype_isUniNull(u);
 }
 
 
-bool Hashtable_trySet(Hashtable* ht, char* key, Unitype u){
+bool Hashtable_trySet(Hashtable* ht, const char* key, Unitype u){
     Unitype* val=Hashtable_getPtr(ht,key);
     if(val==NULL)
         return false;
@@ -116,7 +116,7 @@ bool Hashtable_trySet(Hashtable* ht, char* key, Unitype u){
     return true;
 }
 
-bool Hashtable_tryAdd(Hashtable* ht, char* key, Unitype u){
+bool Hashtable_tryAdd(Hashtable* ht, const char* key, Unitype u){
     Unitype* val=Hashtable_getPtr(ht,key);
     if(val==NULL){
         Hashtable_add(ht, key, u);
@@ -125,7 +125,7 @@ bool Hashtable_tryAdd(Hashtable* ht, char* key, Unitype u){
     return false;
 }
 
-void Hashtable_addOrSet(Hashtable* ht, char* key, Unitype u){
+void Hashtable_addOrSet(Hashtable* ht, const char* key, Unitype u){
     Unitype* val=Hashtable_getPtr(ht, key);
     if(val==NULL)
         Hashtable_add(ht, key, u); // add
diff --git a/kerep/src/Hashtable/Hashtable.h b/kerep/src/Hashtable/Hashtable.h
index 726f4b1..9463c41 100644
--- a/kerep/src/Hashtable/Hashtable.h
+++ b/kerep/src/Hashtable/Hashtable.h
@@ -23,18 +23,18 @@ u16 Hashtable_height(Hashtable* ht);
 // don't add pairs with the same keys,
 // or something weird will happen
 // if not sure, use Hashtable_addOrSet()
-void Hashtable_add(Hashtable* ht, char* key, Unitype u);
+void Hashtable_add(Hashtable* ht, const char* key, Unitype u);
 
-void Hashtable_addOrSet(Hashtable* ht, char* key, Unitype u);
+void Hashtable_addOrSet(Hashtable* ht, const char* key, Unitype u);
 void Hashtable_addMany(Hashtable* ht, KVPair* pair_array, u32 count);
-bool Hashtable_tryAdd(Hashtable* ht, char* key, Unitype u);
-bool Hashtable_trySet(Hashtable* ht, char* key, Unitype u);
+bool Hashtable_tryAdd(Hashtable* ht, const char* key, Unitype u);
+bool Hashtable_trySet(Hashtable* ht, const char* key, Unitype u);
 
 // returns null or pointer to value in hashtable
-Unitype* Hashtable_getPtr(Hashtable* ht, char* key);
+Unitype* Hashtable_getPtr(Hashtable* ht, const char* key);
 
-Unitype Hashtable_get(Hashtable* ht, char* key);
-bool Hashtable_tryGet(Hashtable* ht, char* key, Unitype* output);
+Unitype Hashtable_get(Hashtable* ht, const char* key);
+bool Hashtable_tryGet(Hashtable* ht, const char* key, Unitype* output);
 
 #define Hashtable_foreach(HT, EL, codeblock...) { \
     u16 hmax=Hashtable_height(HT); \
diff --git a/kerep/src/Hashtable/KeyValuePair.h b/kerep/src/Hashtable/KeyValuePair.h
index 99d8117..7316336 100644
--- a/kerep/src/Hashtable/KeyValuePair.h
+++ b/kerep/src/Hashtable/KeyValuePair.h
@@ -8,7 +8,7 @@ extern "C" {
 #include "../Autoarr/Autoarr.h"
 
 STRUCT(KVPair,
-    char* key;
+    const char* key;
     Unitype value;
 )
 
diff --git a/kerep/src/base/type_system/ktDescriptor.h b/kerep/src/base/type_system/ktDescriptor.h
index 189160a..549e9b5 100644
--- a/kerep/src/base/type_system/ktDescriptor.h
+++ b/kerep/src/base/type_system/ktDescriptor.h
@@ -34,7 +34,7 @@ typedef void (*freeMembers_t)(void*);
 typedef char* (*toString_t)(void* obj, u32 fmt);
 
 STRUCT(ktDescriptor,
-    char* name;
+    const char* name;
     ktid id;
     u16 size;
     freeMembers_t freeMembers; // NULL or function which frees all struct members