diff --git a/README.md b/README.md
index 6a64779..818b8cd 100644
--- a/README.md
+++ b/README.md
@@ -70,8 +70,6 @@ To see examples of nimgen in action check out the following wrappers:-
         * git sparse checkout
     * [nimtess2](https://github.com/genotrance/nimtess2) - libtess2 wrapper: [docs](http://nimgen.genotrance.com/nimtess2)
         * git checkout
-    * [libsvm](https://github.com/genotrance/libsvm) - libsvm wrapper: [docs](http://nimgen.genotrance.com/libsvm)
-        * git sparse checkout
     * [duktape-nim](https://github.com/manguluka/duktape-nim) - Duktape wrapper
         * static
 
diff --git a/appveyor.yml b/appveyor.yml
index 2e382be..7d8dabf 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -9,8 +9,8 @@ matrix:
 
 environment:
   matrix:
-    - NIM_VERSION: 0.18.0
-    - NIM_VERSION: 0.19.2
+    - NIM_VERSION: 0.20.0
+    - NIM_VERSION: 0.19.6
 
 for:
 -
diff --git a/nimgen.nimble b/nimgen.nimble
index 8c44026..fc7409e 100644
--- a/nimgen.nimble
+++ b/nimgen.nimble
@@ -1,6 +1,6 @@
 # Package
 
-version       = "0.5.0"
+version       = "0.5.1"
 author        = "genotrance"
 description   = "c2nim helper to simplify and automate the wrapping of C libraries"
 license       = "MIT"
@@ -11,7 +11,7 @@ skipDirs = @["nimgen", "tests", "web"]
 
 # Dependencies
 
-requires "nim >= 0.17.0", "c2nim#3ec45c24585ebaed", "regex >= 0.10.0"
+requires "nim >= 0.19.0", "c2nim >= 0.9.14", "regex >= 0.10.0"
 
 task test, "Test nimgen":
     exec "nim c -r tests/rununittests.nim"
diff --git a/src/nimgen/external.nim b/src/nimgen/external.nim
index 8656147..cc7a5e8 100644
--- a/src/nimgen/external.nim
+++ b/src/nimgen/external.nim
@@ -43,9 +43,10 @@ proc downloadUrl*(url: string) =
     file = url.extractFilename()
     ext = file.splitFile().ext.toLowerAscii()
 
-  var cmd = "curl $# -o $#"
-  if defined(Windows):
-    cmd = "powershell wget $# -OutFile $#"
+  var cmd = if defined(Windows):
+    "powershell [Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; wget $# -OutFile $#"
+  else:
+    "curl -L $# -o $#"
 
   if not (ext == ".zip" and fileExists(gOutput/file)):
     echo "Downloading " & file
diff --git a/tests/nimgentest.nims b/tests/nimgentest.nims
index d8e5737..0de436a 100644
--- a/tests/nimgentest.nims
+++ b/tests/nimgentest.nims
@@ -2,10 +2,11 @@ import distros, ospaths, strutils
 
 var
   pygonly = false
-  comps = @["libsvm", "nim7z", #"nimarchive",
+  comps = @["nim7z", #"nimarchive",
             "nimbass", "nimbigwig",
             "nimclipboard", "nimfuzzy", "nimmonocypher",
-            "nimnuklear", "nimpcre", "nimrax", "nimssl", "nimssh2",
+            #"nimnuklear",
+            "nimpcre", "nimrax", "nimssl", "nimssh2",
             "nimtess2"
           ]