diff --git a/CHANGES.md b/CHANGES.md
index 46979c4..e4ac0b1 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,4 +1,9 @@
 
+v0.7
+- add snappy (c version)
+- update versions: zstd 1.4.5, lz4 1.9.2
+- add github workflow actions
+
 v0.6
 - update versions: zstd 1.3.8, lz4 1.8.3, brotli 1.0.7
 
@@ -6,15 +11,16 @@ v0.5
 - use correct lizard version (v1.0)
 
 v0.4
-- added brotli, added lizard (was lz5 v2.0)
+- add brotli
+- add lizard (was lz5 v2.0)
 - add man pages for the sample programs
-- merged the target platforms unix and windows to "programs"
-- changed options, the tools are like bzip2 or gzip now
+- merge the target platforms unix and windows to "programs"
+- change options, the tools are like bzip2 or gzip now
 - use BSD 2-Clause license for everything
 
 v0.3
 - update to zstd 1.1.3 and lz4 1.7.5
-- changed options, -T is used for the thread count now (like zstdmt of Yann)
+- change options, -T is used for the thread count now (like zstdmt of Yann)
 
 v0.2
 - update to zstd 1.1.2, lz4 1.7.4, lz5 1.5
diff --git a/LICENSE b/LICENSE
index da52765..edaebc3 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,6 @@
 BSD License
 
-Copyright (c) 2016 - 2017, Tino Reichardt, All rights reserved.
+Copyright (c) 2016 - 2020, Tino Reichardt, All rights reserved.
 
 Redistribution and use in source and binary forms, with or without modification,
 are permitted provided that the following conditions are met:
diff --git a/README.md b/README.md
index 6c2c670..1407fc6 100644
--- a/README.md
+++ b/README.md
@@ -57,4 +57,4 @@ size    | value             | description
 [Snappy-c]:https://github.com/andikleen/snappy-c
 
 
-/TR 2017-05-24
+/TR 2020-06-08
diff --git a/man/generate-man b/man/generate-man
index 2ac5d45..c7894dd 100755
--- a/man/generate-man
+++ b/man/generate-man
@@ -1,8 +1,8 @@
 #!/bin/sh
-# /TR 2017-05-22
+# /TR 2020-06-08
 
 # lib version
-ZSTDMT="v0.4"
+ZSTDMT="v0.7"
 
 function generate() {
  PROGNAME="$1"
@@ -14,16 +14,56 @@ function generate() {
  SUFFIX="$7"
  HOMEPAGE="$8"
 
+ if [ $LMAX == 0 ]; then
+   LEVELNUMBERS=""
+ else
+   LEVELNUMBERS="1234567890"
+ fi
+
+ if [ $ALGORITHM == "lizard" ]; then
+   LEVELNOTES=`printf "%q" "
+.TP
+.BI -10..-19
+fastLZ4: designed to give better decompression speed than LZ4 i.e. over 2000 MB/s
+.TP
+.BI -20..-29
+LIZv1: designed to give better ratio than LZ4 keeping 75% decompression speed
+.TP
+.BI -30..-39
+fastLZ4 + Huffman: Huffman coding to fastLZ4
+.TP
+.BI -40..-49
+LIZv1 + Huffman: give the best ratio at decompression speed of 1000 MB/s
+.br
+The default is -3"`
+   LEVELNOTES=${LEVELNOTES:2:-1}
+ elif [ $ALGORITHM == "snappy" ]; then
+   LEVELNOTES=""
+ else
+   LEVELNOTES=`printf "%q" "
+.TP
+.BI -$LMIN..$LMAX
+Use the compression method with a level -$LMIN to -$LMAX.
+.br
+Compression level -$LMIN is the fastest, but provides a poorer level
+of compression.
+.br
+Compression level -$LMAX provides the best level of compression, but is
+also the slowest.
+.br
+The default is -$LDEF"`
+   LEVELNOTES=${LEVELNOTES:2:-1}
+ fi
+
  cat generic.man | sed \
  -e "s|%PROGNAME%|$PROGNAME|g" \
  -e "s|%ALGORITHM%|$ALGORITHM|g" \
- -e "s|%LMIN%|$LMIN|g" \
- -e "s|%LMAX%|$LMAX|g" \
- -e "s|%LDEF%|$LDEF|g" \
  -e "s|%VERSION%|$VERSION|g" \
  -e "s|%SUFFIX%|$SUFFIX|g" \
  -e "s|%HOMEPAGE%|$HOMEPAGE|g" \
  -e "s|%ZSTDMT%|$ZSTDMT|g" \
+ -e "s|%LEVELNUMBERS%|$LEVELNUMBERS|g" \
+ -e "s|%LEVELNOTES%|$LEVELNOTES|g" \
  > "$PROGNAME.1"
 }
 
@@ -33,3 +73,4 @@ generate "lizard-mt" "lizard"  10  49  3   "v2.0"    "liz"  "https://github.com/
 generate "lz4-mt"    "lz4"     1   12  3   "v1.8.3"  "lz4"  "https://github.com/lz4/lz4"
 generate "lz5-mt"    "lz5"     1   15  3   "v1.5"    "lz5"  "https://github.com/inikep/lz5"
 generate "zstd-mt"   "zstd"    1   22  3   "v1.3.7"  "zst"  "https://github.com/facebook/zstd"
+generate "snappy-mt" "snappy"  0    0  0   "v0.0.0"  "snp"  "https://github.com/andikleen/snappy-c"
diff --git a/man/generic.man b/man/generic.man
index e629047..a6fa9d6 100644
--- a/man/generic.man
+++ b/man/generic.man
@@ -11,7 +11,7 @@
 
 .SH SYNOPSIS
 .B %PROGNAME%
-.RB [ -1234567890cdzfhklLqrtvV ]
+.RB [ -%LEVELNUMBERS%cdzfhklLqrtvV ]
 .RB [ "-S \fIsuffix\fP" ]
 .RB [ "\fIfile\fP ..." ]
 
@@ -25,18 +25,7 @@ It's based on the zstdmt library version %ZSTDMT% and version %VERSION% of the %
 More information about %ALGORITHM% can be found here: %HOMEPAGE%
 
 .SH OPTIONS
-
-.TP
-.BI -%LMIN%..%LMAX%
-Use the compression method with a level -%LMIN% to -%LMAX%.
-.br
-Compression level -%LMIN% is the fastest, but provides a poorer level
-of compression.
-.br
-Compression level -%LMAX% provides the best level of compression, but is
-also the slowest.
-.br
-The default is -%LDEF%.
+%LEVELNOTES%
 
 .TP
 .BI -c
@@ -162,7 +151,7 @@ cat somefile.%SUFFIX% | %PROGNAME% -d > somefile
 Please report any bugs to https://github.com/mcmilk/zstdmt/issues
 
 .SH AUTHOR
-This manual page was written by Tino Reichardt <milky-zstdmt (at) mcmilk dot de>
+Tino Reichardt <milky-zstdmt (at) mcmilk.de>
 
 .SH "SEE ALSO"
 .BR bzip2 (1),
diff --git a/programs/Makefile b/programs/Makefile
index 39a2f0a..b8d9736 100644
--- a/programs/Makefile
+++ b/programs/Makefile
@@ -6,7 +6,7 @@
 # current versions we're using (tagged in their main repo)
 BRO_VER	= "v1.0.7"
 LIZ_VER	= "v1.0"
-LZ4_VER	= "v1.8.3"
+LZ4_VER	= "v1.9.2"
 LZ5_VER	= "v1.5"
 ZSTD_VER= "v1.4.5"
 SNAP_VER= "v0.0.0"
@@ -24,8 +24,8 @@ LN	= ln -sf
 CC	= $(CROSS)gcc
 RANLIB	= $(CROSS)ranlib
 STRIP	= $(CROSS)strip
-#SFLAGS	= -R .note -R .comment
-SFLAGS	= #-R .note .comment
+SFLAGS	= -R .note -R .comment
+#SFLAGS	= -R .note .comment
 
 CFLAGS	= -W -pthread -Wall -pipe
 CFLAGS	+= -fomit-frame-pointer
@@ -41,7 +41,7 @@ PRGS	= lizard-mt$(EXTENSION) \
 	  lz5-mt$(EXTENSION) \
 	  brotli-mt$(EXTENSION) \
 	  zstd-mt$(EXTENSION) \
-	  snappy-c-mt$(EXTENSION) 
+	  snappy-mt$(EXTENSION) 
 
 all:	loadsource $(PRGS)
 again:	clean $(PRGS)
@@ -147,7 +147,7 @@ CF_ZSTD	= $(CFLAGS) -I$(ZSTDDIR) -I$(ZSTDDIR)/common -I$(ZSTDDIR)/compress \
 	  -I$(ZSTDDIR)/decompress -I$(ZSTDDIR)/legacy
 
 # snappy-c, https://github.com/andikleen/snappy-c
-SNAPDIR	= snappy-c
+SNAPDIR	= snappy
 LIBSNAP	+= $(SNAPDIR)/snappy.c
 CF_SNAP	= $(CFLAGS) -I$(SNAPDIR)
 
@@ -184,25 +184,24 @@ zstd-mt$(EXTENSION):
 	$(LN) $@ un$@
 	$(LN) $@ zstdcat-mt
 
-snappy-c-mt$(EXTENSION):
+snappy-mt$(EXTENSION):
 	$(CC) $(CF_SNAP) -DVERSION='$(SNAP_VER)' -o $@ $(LIBSNAP) $(LDFLAGS)
 	$(STRIP) $(SFLAGS) $@
 	$(LN) $@ un$@
-	$(LN) $@ snappy-ccat-mt
+	$(LN) $@ snappycat-mt
 
 loadsource:
-	test -d lz4    || git clone https://github.com/Cyan4973/lz4       -b $(LZ4_VER)   --depth=1 lz4
-	test -d lz5    || git clone https://github.com/inikep/lz5         -b $(LZ5_VER)   --depth=1 lz5
-	test -d zstd   || git clone https://github.com/facebook/zstd      -b $(ZSTD_VER)  --depth=1 zstd
-	test -d lizard || git clone https://github.com/inikep/lizard      -b $(LIZ_VER)   --depth=1 lizard
-	test -d brotli || git clone https://github.com/google/brotli      -b $(BRO_VER)   --depth=1 brotli
-	test -d snappy-c || git clone https://github.com/andikleen/snappy-c               --depth=1 snappy-c
-	# cd snappy && cmake CMakeLists.txt && cd ..
+	test -d lz4    || git clone https://github.com/Cyan4973/lz4       -b $(LZ4_VER)  --depth=1 lz4
+	test -d lz5    || git clone https://github.com/inikep/lz5         -b $(LZ5_VER)  --depth=1 lz5
+	test -d zstd   || git clone https://github.com/facebook/zstd      -b $(ZSTD_VER) --depth=1 zstd
+	test -d lizard || git clone https://github.com/inikep/lizard      -b $(LIZ_VER)  --depth=1 lizard
+	test -d brotli || git clone https://github.com/google/brotli      -b $(BRO_VER)  --depth=1 brotli
+	test -d snappy || git clone https://github.com/andikleen/snappy-c                --depth=1 snappy
 
 # tests are unix / linux only
 tests:
 	@dd if=/dev/urandom of=testbytes.raw bs=1M count=10 2>/dev/null
-	@for m in brotli lizard lz4 lz5 zstd snappy-c ; do \
+	@for m in brotli lizard lz4 lz5 zstd snappy ; do \
 	cat testbytes.raw | ./$$m-mt -z > compressed.$$m ; \
 	cat compressed.$$m | ./$$m-mt -d > testbytes-$$m.raw ; \
 	cmp testbytes.raw testbytes-$$m.raw && echo "SUCCESS: $$m" || echo "FAILING: $$m" ; \
@@ -215,8 +214,8 @@ install:
 
 clean:
 	rm -f $(PRGS)
-	rm -f unbrotli-mt unlizard-mt unlz4-mt unlz5-mt unzstd-mt unsnappy-c-mt
-	rm -f brotlicat-mt lizardcat-mt lz4cat-mt lz5cat-mt zstdcat-mt  snappy-ccat-mt
+	rm -f unbrotli-mt unlizard-mt unlz4-mt unlz5-mt unzstd-mt unsnappy-mt
+	rm -f brotlicat-mt lizardcat-mt lz4cat-mt lz5cat-mt zstdcat-mt snappycat-mt
 
 mrproper: clean
-	rm -rf brotli lizard lz4 lz5 zstd snappy-c
+	rm -rf brotli lizard lz4 lz5 zstd snappy
diff --git a/programs/main.c b/programs/main.c
index 560ff83..60b85fd 100644
--- a/programs/main.c
+++ b/programs/main.c
@@ -1,6 +1,6 @@
 
 /**
- * Copyright (c) 2017 Tino Reichardt
+ * Copyright (c) 2017 - 2020 Tino Reichardt
  * All rights reserved.
  *
  * This source code is licensed under the BSD-style license found in the
@@ -81,8 +81,8 @@ static void panic(const char *msg)
 
 static void version(void)
 {
-	printf("%s version %s, zstdmt v0.4\n"
-	       "\nCopyright (c) 2016 - 2017 Tino Reichardt" "\n"
+	printf("%s version %s, zstdmt v0.7\n"
+	       "\nCopyright (c) 2016 - 2020 Tino Reichardt" "\n"
 	       "\n", progname, VERSION);
 	exit(0);
 }
@@ -90,7 +90,7 @@ static void version(void)
 static void license(void)
 {
 	printf("\n %s version %s\n"
-	       "\n Copyright (c) 2016 - 2017 Tino Reichardt"
+	       "\n Copyright (c) 2016 - 2020 Tino Reichardt"
 	       "\n "
 	       "\n Redistribution and use in source and binary forms, with or without modification,"
 	       "\n are permitted provided that the following conditions are met:"