diff --git a/libevmasm/Assembly.cpp b/libevmasm/Assembly.cpp
index fdc27241550b..5bf8e25082e9 100644
--- a/libevmasm/Assembly.cpp
+++ b/libevmasm/Assembly.cpp
@@ -281,7 +281,7 @@ AssemblyItem Assembly::createAssemblyItemFromJSON(Json const& _json, std::vector
 			result = item;
 		}
 		else
-			solThrow(InvalidOpcode, "Invalid opcode: " + name);
+			solThrow(AssemblyImportException, "Invalid opcode (" + name + ")");
 	}
 	result.setLocation(location);
 	result.m_modifierDepth = modifierDepth;
@@ -1236,7 +1236,7 @@ LinkerObject const& Assembly::assembleLegacy() const
 			ret.bytecode += assembleTag(item, ret.bytecode.size(), true);
 			break;
 		default:
-			assertThrow(false, InvalidOpcode, "Unexpected opcode while assembling.");
+			solAssert(false, "Unexpected opcode while assembling.");
 		}
 	}
 
@@ -1469,7 +1469,7 @@ LinkerObject const& Assembly::assembleEOF() const
 				break;
 			}
 			default:
-				solThrow(InvalidOpcode, "Unexpected opcode while assembling.");
+				solAssert(false, "Unexpected opcode while assembling.");
 			}
 		}
 
diff --git a/libevmasm/Assembly.h b/libevmasm/Assembly.h
index 4b52ca3d7970..f2da01e22f9a 100644
--- a/libevmasm/Assembly.h
+++ b/libevmasm/Assembly.h
@@ -127,8 +127,8 @@ class Assembly
 	void appendToAuxiliaryData(bytes const& _data) { m_auxiliaryData += _data; }
 
 	int deposit() const { return m_deposit; }
-	void adjustDeposit(int _adjustment) { m_deposit += _adjustment; assertThrow(m_deposit >= 0, InvalidDeposit, ""); }
-	void setDeposit(int _deposit) { m_deposit = _deposit; assertThrow(m_deposit >= 0, InvalidDeposit, ""); }
+	void adjustDeposit(int _adjustment) { m_deposit += _adjustment; solAssert(m_deposit >= 0); }
+	void setDeposit(int _deposit) { m_deposit = _deposit; solAssert(m_deposit >= 0); }
 	std::string const& name() const { return m_name; }
 
 	/// Changes the source location used for each appended item.
diff --git a/libevmasm/Exceptions.h b/libevmasm/Exceptions.h
index ae6d1bf9c617..c9d0633e4c2c 100644
--- a/libevmasm/Exceptions.h
+++ b/libevmasm/Exceptions.h
@@ -33,7 +33,4 @@ struct OptimizerException: virtual AssemblyException {};
 struct StackTooDeepException: virtual OptimizerException {};
 struct ItemNotAvailableException: virtual OptimizerException {};
 
-DEV_SIMPLE_EXCEPTION(InvalidDeposit);
-DEV_SIMPLE_EXCEPTION(InvalidOpcode);
-
 }
diff --git a/libevmasm/Instruction.h b/libevmasm/Instruction.h
index 76998c538d5f..84c6e34e6272 100644
--- a/libevmasm/Instruction.h
+++ b/libevmasm/Instruction.h
@@ -26,6 +26,7 @@
 #include <libsolutil/Common.h>
 #include <libsolutil/Assertions.h>
 #include <liblangutil/EVMVersion.h>
+#include <liblangutil/Exceptions.h>
 
 namespace solidity::evmasm
 {
@@ -267,28 +268,28 @@ inline unsigned getLogNumber(Instruction _inst)
 /// @returns the PUSH<_number> instruction
 inline Instruction pushInstruction(unsigned _number)
 {
-	assertThrow(_number <= 32, InvalidOpcode, std::string("Invalid PUSH instruction requested (") + std::to_string(_number) + ").");
+	solAssert(_number <= 32);
 	return Instruction(unsigned(Instruction::PUSH0) + _number);
 }
 
 /// @returns the DUP<_number> instruction
 inline Instruction dupInstruction(unsigned _number)
 {
-	assertThrow(1 <= _number && _number <= 16, InvalidOpcode, std::string("Invalid DUP instruction requested (") + std::to_string(_number) + ").");
+	solAssert(1 <= _number && _number <= 16);
 	return Instruction(unsigned(Instruction::DUP1) + _number - 1);
 }
 
 /// @returns the SWAP<_number> instruction
 inline Instruction swapInstruction(unsigned _number)
 {
-	assertThrow(1 <= _number && _number <= 16, InvalidOpcode, std::string("Invalid SWAP instruction requested (") + std::to_string(_number) + ").");
+	solAssert(1 <= _number && _number <= 16);
 	return Instruction(unsigned(Instruction::SWAP1) + _number - 1);
 }
 
 /// @returns the LOG<_number> instruction
 inline Instruction logInstruction(unsigned _number)
 {
-	assertThrow(_number <= 4, InvalidOpcode, std::string("Invalid LOG instruction requested (") + std::to_string(_number) + ").");
+	solAssert(_number <= 4);
 	return Instruction(unsigned(Instruction::LOG0) + _number);
 }
 
diff --git a/libevmasm/KnownState.cpp b/libevmasm/KnownState.cpp
index 3878ae0fdd75..66553bc06633 100644
--- a/libevmasm/KnownState.cpp
+++ b/libevmasm/KnownState.cpp
@@ -120,7 +120,7 @@ KnownState::StoreOperation KnownState::feedItem(AssemblyItem const& _item, bool
 	}
 	else if (_item.type() != Operation)
 	{
-		assertThrow(_item.deposit() == 1, InvalidDeposit, "");
+		solAssert(_item.deposit() == 1);
 		if (_item.pushedValue())
 			// only available after assembly stage, should not be used for optimisation
 			setStackElement(++m_stackHeight, m_expressionClasses->find(*_item.pushedValue()));
@@ -194,7 +194,7 @@ KnownState::StoreOperation KnownState::feedItem(AssemblyItem const& _item, bool
 					resetStorage();
 				if (invMem || invStor)
 					m_sequenceNumber += 2; // Increment by two because it can read and write
-				assertThrow(info.ret <= 1, InvalidDeposit, "");
+				solAssert(info.ret <= 1);
 				if (info.ret == 1)
 					setStackElement(
 						m_stackHeight + static_cast<int>(_item.deposit()),
diff --git a/libsolidity/interface/StandardCompiler.cpp b/libsolidity/interface/StandardCompiler.cpp
index c5248e42e2f4..351a17b897d6 100644
--- a/libsolidity/interface/StandardCompiler.cpp
+++ b/libsolidity/interface/StandardCompiler.cpp
@@ -1220,10 +1220,6 @@ Json StandardCompiler::importEVMAssembly(StandardCompiler::InputsAndSettings _in
 	{
 		return formatFatalError(Error::Type::Exception, "Assembly import error: " + std::string(e.what()));
 	}
-	catch (evmasm::InvalidOpcode const& e)
-	{
-		return formatFatalError(Error::Type::Exception, "Assembly import error: " + std::string(e.what()));
-	}
 	catch (...)
 	{
 		return formatError(
diff --git a/test/cmdlineTests/standard_import_asm_json_invalid_opcode/output.json b/test/cmdlineTests/standard_import_asm_json_invalid_opcode/output.json
index cccd241d9416..14e502301f20 100644
--- a/test/cmdlineTests/standard_import_asm_json_invalid_opcode/output.json
+++ b/test/cmdlineTests/standard_import_asm_json_invalid_opcode/output.json
@@ -2,8 +2,8 @@
     "errors": [
         {
             "component": "general",
-            "formattedMessage": "Assembly import error: InvalidOpcode",
-            "message": "Assembly import error: InvalidOpcode",
+            "formattedMessage": "Assembly import error: Invalid opcode (INVALID_OPCODE)",
+            "message": "Assembly import error: Invalid opcode (INVALID_OPCODE)",
             "severity": "error",
             "type": "Exception"
         }