diff --git a/mythril/disassembler/asm.py b/mythril/disassembler/asm.py
index 0340b80e..7e503602 100644
--- a/mythril/disassembler/asm.py
+++ b/mythril/disassembler/asm.py
@@ -106,8 +106,10 @@ def disassemble(bytecode) -> list:
         length = len(bytecode)
         part_code = bytecode[-43:]
     else:
-        part_code = bytes(bytecode[-43:])
-
+        try:
+            part_code = bytes(bytecode[-43:])
+        except TypeError:
+            part_code = ""
     try:
         if "bzzr" in str(part_code):
             # ignore swarm hash
diff --git a/mythril/laser/ethereum/svm.py b/mythril/laser/ethereum/svm.py
index 2e467f43..66cb040b 100644
--- a/mythril/laser/ethereum/svm.py
+++ b/mythril/laser/ethereum/svm.py
@@ -169,7 +169,8 @@ class LaserEVM:
             if len(self.open_states) == 0:
                 log.warning(
                     "No contract was created during the execution of contract creation "
-                    "Increase the resources for creation execution (--max-depth or --create-timeout)"
+                    "Increase the resources for creation execution (--max-depth or --create-timeout) "
+                    "Check whether the bytecode is indeed the creation code, otherwise use the --bin-runtime flag"
                 )
 
             self._execute_transactions(created_account.address)
diff --git a/requirements.txt b/requirements.txt
index cacde0cb..51110d19 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,7 +9,7 @@ eth-account
 ethereum-input-decoder>=0.2.2
 eth-hash>=0.3.1
 eth-keyfile>=0.5.1
-eth-keys>=0.2.0b3
+eth-keys<0.4.0,>=0.2.1
 eth-rlp>=0.1.0
 eth-tester
 eth-typing<3.0.0,>=2.1.0