diff --git a/CMakeLists.txt b/CMakeLists.txt
index 450f1569e..a89aec981 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -43,8 +43,8 @@ if(DEFINED WASI_SDK_PREFIX)
     install(DIRECTORY ${WASI_SDK_PREFIX}/ USE_SOURCE_PERMISSIONS DESTINATION . COMPONENT WASI EXCLUDE_FROM_ALL)
 elseif(${CMAKE_HOST_SYSTEM_NAME} STREQUAL "Linux")
     ExternalProject_Add(wasi-sdk
-        URL https://github.com/WebAssembly/wasi-sdk/releases/download/wasi-sdk-19/wasi-sdk-19.0-linux.tar.gz
-        URL_HASH SHA256=d900abc826eec1955b9afd250e7cc2496338abbf6c440d86a313c06e42083fa1
+        URL https://github.com/WebAssembly/wasi-sdk/releases/download/wasi-sdk-20/wasi-sdk-20.0-linux.tar.gz
+        URL_HASH SHA256=7030139d495a19fbeccb9449150c2b1531e15d8fb74419872a719a7580aad0f9
         CONFIGURE_COMMAND ""
         BUILD_COMMAND ""
         INSTALL_COMMAND ""
diff --git a/external/eos-vm b/external/eos-vm
index f2163478d..cc4d920e5 160000
--- a/external/eos-vm
+++ b/external/eos-vm
@@ -1 +1 @@
-Subproject commit f2163478deffb22d084e79c95b25241a7a1ad098
+Subproject commit cc4d920e52ffa301b1a1be000ee778ba011513c3
diff --git a/libraries/psibase/native/src/ExecutionContext.cpp b/libraries/psibase/native/src/ExecutionContext.cpp
index 0cb0a5762..dbc1db526 100644
--- a/libraries/psibase/native/src/ExecutionContext.cpp
+++ b/libraries/psibase/native/src/ExecutionContext.cpp
@@ -19,8 +19,12 @@ using eosio::vm::span;
 namespace psibase
 {
    struct ExecutionContextImpl;
-   using rhf_t     = eosio::vm::registered_host_functions<ExecutionContextImpl>;
+   using rhf_t = eosio::vm::registered_host_functions<ExecutionContextImpl>;
+#ifdef __x86_64__
    using backend_t = eosio::vm::backend<rhf_t, eosio::vm::jit_profile, VMOptions>;
+#else
+   using backend_t = eosio::vm::backend<rhf_t, eosio::vm::interpreter, VMOptions>;
+#endif
 
    // Rethrow with detailed info
    template <typename F>
@@ -70,10 +74,12 @@ namespace psibase
 
    struct BackendEntry
    {
-      Checksum256                                   hash;
-      VMOptions                                     vmOptions;
-      std::unique_ptr<backend_t>                    backend;
+      Checksum256                hash;
+      VMOptions                  vmOptions;
+      std::unique_ptr<backend_t> backend;
+#ifdef __x86_64__
       std::shared_ptr<dwarf::debugger_registration> debug;
+#endif
 
       auto byHash() const { return std::tie(hash, vmOptions); }
    };
@@ -201,6 +207,7 @@ namespace psibase
                 {
                    psio::input_stream s{reinterpret_cast<const char*>(c->code.data()),
                                         c->code.size()};
+#ifdef __x86_64__
                    if (dwarf::has_debug_info(s))
                    {
                       debug_eos_vm::debug_instr_map debug;
@@ -215,6 +222,9 @@ namespace psibase
                       backend.backend = std::make_unique<backend_t>(c->code, nullptr, vmOptions);
                       backend.debug = dwarf::register_with_debugger(backend.backend->get_module());
                    }
+#else
+                   backend.backend = std::make_unique<backend_t>(c->code, nullptr, vmOptions);
+#endif
                 }
              });
       }
@@ -310,7 +320,7 @@ namespace psibase
 
    std::uint32_t ExecutionContext::remainingStack() const
    {
-      return impl->backend.backend->get_context()._remaining_call_depth;
+      return impl->backend.backend->get_context().get_remaining_call_depth();
    }
 
    void ExecutionContext::execProcessTransaction(ActionContext& actionContext)
diff --git a/libraries/psibase/sdk/psibase-wasm-opt b/libraries/psibase/sdk/psibase-wasm-opt
index 9add76f0c..daba26248 100755
--- a/libraries/psibase/sdk/psibase-wasm-opt
+++ b/libraries/psibase/sdk/psibase-wasm-opt
@@ -6,5 +6,5 @@
 #   generates code that won't run on psibase.
 if which wasm-opt >/dev/null 2>&1
 then
-    wasm-opt --disable-sign-ext --enable-simd --enable-bulk-memory "$@"
+    wasm-opt --enable-sign-ext --enable-nontrapping-float-to-int --enable-simd --enable-bulk-memory "$@"
 fi
diff --git a/libraries/psibase/sdk/toolchain.cmake b/libraries/psibase/sdk/toolchain.cmake
index 02fa629a2..c13d3bceb 100644
--- a/libraries/psibase/sdk/toolchain.cmake
+++ b/libraries/psibase/sdk/toolchain.cmake
@@ -44,7 +44,7 @@ set(CMAKE_TRY_COMPILE_PLATFORM_VARIABLES WASI_SDK_PREFIX)
 
 if(NOT __psibase_toolchain_included)
     set(__psibase_toolchain_included 1)
-    string(APPEND CMAKE_CXX_FLAGS_INIT "-mno-sign-ext -msimd128")
+    string(APPEND CMAKE_CXX_FLAGS_INIT "-msign-ext -msimd128 -mnontrapping-fptoint -mbulk-memory")
     string(APPEND CMAKE_C_FLAGS_DEBUG_INIT " -ggdb")
     string(APPEND CMAKE_CXX_FLAGS_DEBUG_INIT " -ggdb")
     string(APPEND CMAKE_C_FLAGS_RELWITHDEBINFO_INIT " -ggdb")
diff --git a/programs/psitest/main.cpp b/programs/psitest/main.cpp
index f4e8d2f5f..3700fb569 100644
--- a/programs/psitest/main.cpp
+++ b/programs/psitest/main.cpp
@@ -48,7 +48,11 @@ void eosio::vm::machine_code_writer<eosio::vm::jit_execution_context<callbacks,
 
 using backend_t = eosio::vm::backend<  //
     rhf_t,
+#ifdef __x86_64__
     eosio::vm::jit_profile,
+#else
+    eosio::vm::interpreter,
+#endif
     vm_options,
     debug_eos_vm::debug_instr_map>;
 
diff --git a/services/system/VerifyEcSys/CMakeLists.txt b/services/system/VerifyEcSys/CMakeLists.txt
index bef10fb55..5c5706a33 100644
--- a/services/system/VerifyEcSys/CMakeLists.txt
+++ b/services/system/VerifyEcSys/CMakeLists.txt
@@ -8,7 +8,7 @@ function(add suffix)
     add_custom_command(TARGET VerifyEcSys${suffix} POST_BUILD
         COMMAND wasm-ctor-eval
             -c prestart
-            --enable-bulk-memory
+            --enable-sign-ext --enable-nontrapping-float-to-int --enable-simd --enable-bulk-memory
             VerifyEcSys-prestart${suffix}.wasm
             -o ${ROOT_BINARY_DIR}/VerifyEcSys${suffix}.wasm
     )
diff --git a/wasm/CMakeLists.txt b/wasm/CMakeLists.txt
index ae3772e3d..349004d22 100644
--- a/wasm/CMakeLists.txt
+++ b/wasm/CMakeLists.txt
@@ -71,13 +71,15 @@ endmacro()
 include(GNUInstallDirs)
 install(FILES ${ROOT_SOURCE_DIR}/LICENSE DESTINATION ${CMAKE_INSTALL_DATADIR}/psibase/licenses COMPONENT libpsibase)
 
+set(WASM_FEATURES -msign-ext -mnontrapping-fptoint -msimd128 -mbulk-memory)
+
 add_library(wasm-base INTERFACE)
-target_compile_options(wasm-base INTERFACE -mno-sign-ext -fno-exceptions -DCOMPILING_WASM -mthread-model single -O3)
-target_link_options(wasm-base INTERFACE -mno-sign-ext -B${ROOT_SOURCE_DIR}/libraries/psibase/sdk/psibase- -Wl,--strip-all -O3 -L${ROOT_BINARY_DIR}/wasm/deps/lib)
+target_compile_options(wasm-base INTERFACE ${WASM_FEATURES} -fno-exceptions -DCOMPILING_WASM -mthread-model single -O3)
+target_link_options(wasm-base INTERFACE ${WASM_FEATURES} -B${ROOT_SOURCE_DIR}/libraries/psibase/sdk/psibase- -Wl,--strip-all -O3 -L${ROOT_BINARY_DIR}/wasm/deps/lib)
 
 add_library(wasm-base-debug INTERFACE)
-target_compile_options(wasm-base-debug INTERFACE -mno-sign-ext -fno-exceptions -DCOMPILING_WASM -mthread-model single -ggdb)
-target_link_options(wasm-base-debug INTERFACE -mno-sign-ext -ggdb -L${ROOT_BINARY_DIR}/wasm/deps/lib)
+target_compile_options(wasm-base-debug INTERFACE ${WASM_FEATURES} -fno-exceptions -DCOMPILING_WASM -mthread-model single -ggdb)
+target_link_options(wasm-base-debug INTERFACE ${WASM_FEATURES} -ggdb -L${ROOT_BINARY_DIR}/wasm/deps/lib)
 
 function(target_mapped_include_directories target type)
     target_include_directories(${target} ${type} ${ARGN})