diff --git a/CHANGELOG.md b/CHANGELOG.md
index bfad679..b7cdc7b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## [0.0.3]
+
+- Update core modules
+- Set default cores to all available minus 1
+
+
 ## [0.0.2]
 
 - Show duration estimate for weeks, months and years
@@ -7,4 +13,4 @@
 
 ## [0.0.1]
 
-- First release
\ No newline at end of file
+- First release
diff --git a/Makefile b/Makefile
index 48ef3a3..2adfdab 100644
--- a/Makefile
+++ b/Makefile
@@ -3,7 +3,7 @@ VERSION ?= `[ -d ".git" ] && git describe --tags || echo "0.0.0"`
 LDFLAGS=-ldflags "-s -w -X main.appVersion=${VERSION}"
 BINARY="wireguard-vanity-keygen"
 
-build = echo "\n\nBuilding $(1)-$(2)" && GOOS=$(1) GOARCH=$(2) go build ${LDFLAGS} -o dist/${BINARY}_${VERSION}_$(1)_$(2) \
+build = echo "\n\nBuilding $(1)-$(2)" && GO386=softfloat GOOS=$(1) GOARCH=$(2) go build ${LDFLAGS} -o dist/${BINARY}_${VERSION}_$(1)_$(2) \
 	&& bzip2 dist/${BINARY}_${VERSION}_$(1)_$(2) \
 	&& if [ $(1) = "windows" ]; then mv dist/${BINARY}_${VERSION}_$(1)_$(2).bz2 dist/${BINARY}_${VERSION}_$(1)_$(2).exe.bz2; fi
 
@@ -21,7 +21,7 @@ release:
 	$(call build,linux,386)
 	$(call build,linux,arm)
 	$(call build,linux,arm64)
+	$(call build,darwin,arm64)
 	$(call build,darwin,amd64)
-	$(call build,darwin,386)
 	$(call build,windows,386)
 	$(call build,windows,amd64)
diff --git a/README.md b/README.md
index 9481606..b60d469 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@ A command-line vanity (public) key generator for [WireGuard](https://www.wiregua
 - Optional case sensitive searching
 - Search multiple prefixes at once
 - Exit after results limit reached (defaults to 1)
-- Displays probablibilty and estimated runtime based on quick benchmark
+- Displays probability and estimated runtime based on quick benchmark
 
 
 ## Usage options
@@ -22,7 +22,7 @@ Usage: wireguard-vanity-keygen [OPTIONS] <SEARCH> [<SEARCH>...]
 
 Options:
   -c, --case-sensitive   case sensitive match (default false)
-  -t, --threads int      threads (default 4)
+  -t, --threads int      threads (defaults to all available cores minus 1)
   -l, --limit int        limit results to n (exists after) (default 1)
 ```
 
@@ -51,7 +51,7 @@ private 8IdcNsman/ZRGvqWzw1e5cRfhhdtAAmk02X9TkQxhHI=   public pC1/N8coOcXmcwO09Q
 ## Installing
 
 Download the [latest binary release](https://github.com/axllent/wireguard-vanity-keygen/releases/latest) for your system, 
-or build from source `go get -u github.com/axllent/wireguard-vanity-keygen`(go >= 1.11 required)
+or build from source `go install github.com/axllent/wireguard-vanity-keygen`.
 
 
 ## FAQ
@@ -68,9 +68,9 @@ With case-insensitive searches (default), a-z have the chance of matching both u
 
 ### How accurate are the estimated times?
 
-They are not and cannot be accurate. Keys are completely randomly generated, and the estimate is based on a law of averages. For instance, you could find a match for a one in a billion chance on the very first hit, or it could take you 5 billion attempts. It will however give you an indication based on word count, case sensitivity, and use of numbers or characters.
+They are not (and cannot be) accurate. Keys are completely randomly generated, and the estimate is based on a law of averages. For instance, you could find a match for a one in a billion chance on the very first hit, or it could take you 5 billion attempts. It will however give you an indication based on your CPU speed, word count, case sensitivity, and use of numbers or characters.
 
 
 ### Why do I need this?
 
-You don't. I wrote it because I run a WireGuard server, which does not provide any reference as to who the key belongs to (`wg` on the server). Using vanity keys, I can at least identify connections. I also wanted to learn more about multi-coe processing in Golang.
+You don't. I wrote it because I run a WireGuard server, which does not provide any reference as to who the key belongs to (`wg` on the server). Using vanity keys, I can at least identify connections. I also wanted to learn more about multi-core processing in Golang.
diff --git a/go.mod b/go.mod
index 3bd1e14..022b9e8 100644
--- a/go.mod
+++ b/go.mod
@@ -1,8 +1,8 @@
 module github.com/axllent/wireguard-vanity-keygen
 
-go 1.14
+go 1.17
 
 require (
 	github.com/spf13/pflag v1.0.5
-	golang.org/x/crypto v0.0.0-20200406173513-056763e48d71
+	golang.org/x/crypto v0.0.0-20220112180741-5e0467b6c7ce
 )
diff --git a/go.sum b/go.sum
index 665aa15..301387a 100644
--- a/go.sum
+++ b/go.sum
@@ -1,9 +1,11 @@
 github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
 github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
-golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
-golang.org/x/crypto v0.0.0-20200406173513-056763e48d71 h1:DOmugCavvUtnUD114C1Wh+UgTgQZ4pMLzXxi1pSt+/Y=
-golang.org/x/crypto v0.0.0-20200406173513-056763e48d71/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
-golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
-golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.org/x/crypto v0.0.0-20220112180741-5e0467b6c7ce h1:Roh6XWxHFKrPgC/EQhVubSAGQ6Ozk6IdxHSzt1mR0EI=
+golang.org/x/crypto v0.0.0-20220112180741-5e0467b6c7ce/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
+golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
+golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
+golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
diff --git a/main.go b/main.go
index 77d1a76..982c8fe 100644
--- a/main.go
+++ b/main.go
@@ -22,7 +22,12 @@ func main() {
 	var userCores int
 
 	flag := pflag.NewFlagSet(os.Args[0], pflag.ExitOnError)
-	cores := runtime.NumCPU()
+	// detect number of cores minus one
+	cores := runtime.NumCPU() - 1
+	if cores == 0 {
+		// if it is single-code then it
+		cores = 1
+	}
 
 	// set the default help
 	flag.Usage = func() {