diff --git a/README-dev.md b/README-dev.md
index 9318bdf7..ae817079 100644
--- a/README-dev.md
+++ b/README-dev.md
@@ -98,4 +98,10 @@ void vcalc_sha256(char deprecated[(256 >> 3) * 2 + 1],uint8_t hash[256 >> 3],uin
     CSHA256().Write((const unsigned char *)src, len).Finalize(hash);
 }
 ```
-bcz few procedures uses `vcalc_sha256` even to check incoming block, so it needs to use fast sha256 implementation in case if we have experimental asm enabled.
\ No newline at end of file
+bcz few procedures uses `vcalc_sha256` even to check incoming block, so it needs to use fast sha256 implementation in case if we have experimental asm enabled.
+
+[x] Already done.
+
+### part 4
+
+- Probably we have some unexpected / unpredictable behavior (strange side-effect) with this [linux_release_CFLAGS: -O1 -> -O2](https://github.com/DeckerSU/KomodoOcean/commit/511b27aba1c53b05acdc2a169eb374017b7b9145) commit. When wallet built with `CXXFLAGS='-g0 -O2'` all is ok, when with `CXXFLAGS='-g -O2'` - it's ok too. But when we tried to build wallet with just `CXXFLAGS='-g'` in `zcutil/build.sh ` it crashed somewhere in init of [CDBEnv](https://github.com/DeckerSU/KomodoOcean/blob/b8d315bbbece1cb3786855dae40de70a3f8385f0/src/wallet/db.cpp#L49). So, i just want to mention it here. In future it should be investigated to find a solution, may be commit should be reverted or additional BDB build flags should be added.
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diff --git a/depends/packages/openssl.mk b/depends/packages/openssl.mk
index c5ac5bb3..296a5538 100644
--- a/depends/packages/openssl.mk
+++ b/depends/packages/openssl.mk
@@ -1,9 +1,8 @@
 package=openssl
-$(package)_version=1.1.1a
+$(package)_version=1.1.1f
 $(package)_download_path=https://www.openssl.org/source
 $(package)_file_name=$(package)-$($(package)_version).tar.gz
-$(package)_sha256_hash=fc20130f8b7cbd2fb918b2f14e2f429e109c31ddd0fb38fc5d71d9ffed3f9f41
-$(package)_patches=ssl_fix.patch
+$(package)_sha256_hash=186c6bfe6ecfba7a5b48c47f8a1673d0f3b0e5ba2e25602dd23b629975da3f35
 
 define $(package)_set_vars
 $(package)_config_env=AR="$($(package)_ar)" RANLIB="$($(package)_ranlib)" CC="$($(package)_cc)"
@@ -90,8 +89,7 @@ endef
 
 define $(package)_preprocess_cmds
   sed -i.old 's/built on: $date/built on: not available/' util/mkbuildinf.pl && \
-  sed -i.old "s|\"engines\", \"apps\", \"test\"|\"engines\"|" Configure && \
-  patch -p1 < $($(package)_patch_dir)/ssl_fix.patch
+  sed -i.old "s|\"engines\", \"apps\", \"test\"|\"engines\"|" Configure
 endef
 
 define $(package)_config_cmds