diff --git a/src/compress_lzma.cpp b/src/compress_lzma.cpp
index cf017c6d..62d51f96 100644
--- a/src/compress_lzma.cpp
+++ b/src/compress_lzma.cpp
@@ -33,15 +33,9 @@
 #if (ACC_CC_CLANG)
 #  pragma clang diagnostic ignored "-Wshadow"
 #endif
-#if (ACC_CC_CLANG >= 0x0b0000)
-#  pragma clang diagnostic ignored "-Wsuggest-override"
-#endif
 #if (ACC_CC_GNUC >= 0x040200)
 #  pragma GCC diagnostic ignored "-Wshadow"
 #endif
-#if (ACC_CC_GNUC >= 0x0a0000)
-#  pragma GCC diagnostic ignored "-Wsuggest-override"
-#endif
 #if (ACC_CC_MSC)
 #  pragma warning(disable: 4456)    // -Wno-shadow
 #endif
@@ -252,7 +246,7 @@ struct InStream: public ISequentialInStream, public CMyUnknownImp
     void Init(const Byte *data, size_t size) {
         b_buf = data; b_size = size; b_pos = 0;
     }
-    STDMETHOD(Read)(void *data, UInt32 size, UInt32 *processedSize);
+    STDMETHOD(Read)(void *data, UInt32 size, UInt32 *processedSize) override;
 };
 
 STDMETHODIMP InStream::Read(void *data, UInt32 size, UInt32 *processedSize)
@@ -278,7 +272,7 @@ struct OutStream : public ISequentialOutStream, public CMyUnknownImp
         b_buf[b_pos++] = c;
         return S_OK;
     }
-    STDMETHOD(Write)(const void *data, UInt32 size, UInt32 *processedSize);
+    STDMETHOD(Write)(const void *data, UInt32 size, UInt32 *processedSize) override;
 };
 
 STDMETHODIMP OutStream::Write(const void *data, UInt32 size, UInt32 *processedSize)
@@ -295,7 +289,7 @@ struct ProgressInfo : public ICompressProgressInfo, public CMyUnknownImp
 {
     virtual ~ProgressInfo() { }
     MY_UNKNOWN_IMP
-    STDMETHOD(SetRatioInfo)(const UInt64 *inSize, const UInt64 *outSize);
+    STDMETHOD(SetRatioInfo)(const UInt64 *inSize, const UInt64 *outSize) override;
     upx_callback_p cb;
 };
 
diff --git a/vendor/lzma-sdk b/vendor/lzma-sdk
index 0def6755..a0fe54d9 160000
--- a/vendor/lzma-sdk
+++ b/vendor/lzma-sdk
@@ -1 +1 @@
-Subproject commit 0def675572209872f35f0638420bf49fa438d49c
+Subproject commit a0fe54d99fd15cc2747d0bdce6ffb51e18e06275