diff --git a/secp256k1-zkp-sys/depend/secp256k1/src/secp256k1.c b/secp256k1-zkp-sys/depend/secp256k1/src/secp256k1.c
index 4c57826..dacaed2 100644
--- a/secp256k1-zkp-sys/depend/secp256k1/src/secp256k1.c
+++ b/secp256k1-zkp-sys/depend/secp256k1/src/secp256k1.c
@@ -158,17 +158,6 @@ secp256k1_context* secp256k1_context_preallocated_create(void* prealloc, unsigne
     return ret;
 }
 
-secp256k1_context* secp256k1_context_create(unsigned int flags) {
-    size_t const prealloc_size = secp256k1_context_preallocated_size(flags);
-    secp256k1_context* ctx = (secp256k1_context*)checked_malloc(&default_error_callback, prealloc_size);
-    if (EXPECT(secp256k1_context_preallocated_create(ctx, flags) == NULL, 0)) {
-        free(ctx);
-        return NULL;
-    }
-
-    return ctx;
-}
-
 secp256k1_context* secp256k1_context_preallocated_clone(const secp256k1_context* ctx, void* prealloc) {
     secp256k1_context* ret;
     VERIFY_CHECK(ctx != NULL);
@@ -180,19 +169,6 @@ secp256k1_context* secp256k1_context_preallocated_clone(const secp256k1_context*
     return ret;
 }
 
-secp256k1_context* secp256k1_context_clone(const secp256k1_context* ctx) {
-    secp256k1_context* ret;
-    size_t prealloc_size;
-
-    VERIFY_CHECK(ctx != NULL);
-    ARG_CHECK(secp256k1_context_is_proper(ctx));
-
-    prealloc_size = secp256k1_context_preallocated_clone_size(ctx);
-    ret = (secp256k1_context*)checked_malloc(&ctx->error_callback, prealloc_size);
-    ret = secp256k1_context_preallocated_clone(ctx, ret);
-    return ret;
-}
-
 void secp256k1_context_preallocated_destroy(secp256k1_context* ctx) {
     ARG_CHECK_VOID(ctx == NULL || secp256k1_context_is_proper(ctx));
 
@@ -204,18 +180,6 @@ void secp256k1_context_preallocated_destroy(secp256k1_context* ctx) {
     secp256k1_ecmult_gen_context_clear(&ctx->ecmult_gen_ctx);
 }
 
-void secp256k1_context_destroy(secp256k1_context* ctx) {
-    ARG_CHECK_VOID(ctx == NULL || secp256k1_context_is_proper(ctx));
-
-    /* Defined as noop */
-    if (ctx == NULL) {
-        return;
-    }
-
-    secp256k1_context_preallocated_destroy(ctx);
-    free(ctx);
-}
-
 void secp256k1_context_set_illegal_callback(secp256k1_context* ctx, void (*fun)(const char* message, void* data), const void* data) {
     /* We compare pointers instead of checking secp256k1_context_is_proper() here
        because setting callbacks is allowed on *copies* of the static context:
@@ -240,16 +204,6 @@ void secp256k1_context_set_error_callback(secp256k1_context* ctx, void (*fun)(co
     ctx->error_callback.data = data;
 }
 
-secp256k1_scratch_space* secp256k1_scratch_space_create(const secp256k1_context* ctx, size_t max_size) {
-    VERIFY_CHECK(ctx != NULL);
-    return secp256k1_scratch_create(&ctx->error_callback, max_size);
-}
-
-void secp256k1_scratch_space_destroy(const secp256k1_context *ctx, secp256k1_scratch_space* scratch) {
-    VERIFY_CHECK(ctx != NULL);
-    secp256k1_scratch_destroy(&ctx->error_callback, scratch);
-}
-
 /* Mark memory as no-longer-secret for the purpose of analysing constant-time behaviour
  *  of the software.
  */