diff --git a/package-lock.json b/package-lock.json
index 2fa8b1b4a..f01513eda 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
 	"name": "pptxgenjs",
-	"version": "3.5.0",
+	"version": "3.6.0-beta",
 	"lockfileVersion": 1,
 	"requires": true,
 	"dependencies": {
@@ -938,7 +938,7 @@
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 				"readable-stream": {
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-					"resolved": "http://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
+					"resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
 					"integrity": "sha512-tQtKA9WIAhBF3+VLAseyMqZeBjW0AHJoxOtYqSUZNJxauErmLbVm2FW1y+J/YA9dUrAC39ITejlZWhVIwawkKw==",
 					"dev": true,
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@@ -953,7 +953,7 @@
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 					"version": "1.1.1",
-					"resolved": "http://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
+					"resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
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@@ -1361,7 +1361,7 @@
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 				"readable-stream": {
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-					"resolved": "http://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
+					"resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
 					"integrity": "sha512-tQtKA9WIAhBF3+VLAseyMqZeBjW0AHJoxOtYqSUZNJxauErmLbVm2FW1y+J/YA9dUrAC39ITejlZWhVIwawkKw==",
 					"dev": true,
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@@ -1376,7 +1376,7 @@
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-					"resolved": "http://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
+					"resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
 					"integrity": "sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==",
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@@ -1854,7 +1854,7 @@
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-					"resolved": "http://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
+					"resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
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 					"dev": true,
 					"requires": {
@@ -1869,7 +1869,7 @@
 				},
 				"string_decoder": {
 					"version": "1.1.1",
-					"resolved": "http://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
+					"resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
 					"integrity": "sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==",
 					"dev": true,
 					"requires": {
@@ -2159,12 +2159,6 @@
 					"dev": true,
 					"optional": true
 				},
-				"ini": {
-					"version": "1.3.5",
-					"bundled": true,
-					"dev": true,
-					"optional": true
-				},
 				"is-fullwidth-code-point": {
 					"version": "1.0.0",
 					"bundled": true,
@@ -2597,7 +2591,7 @@
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 				"readable-stream": {
 					"version": "2.3.6",
-					"resolved": "http://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
+					"resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
 					"integrity": "sha512-tQtKA9WIAhBF3+VLAseyMqZeBjW0AHJoxOtYqSUZNJxauErmLbVm2FW1y+J/YA9dUrAC39ITejlZWhVIwawkKw==",
 					"dev": true,
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@@ -2612,7 +2606,7 @@
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 				"string_decoder": {
 					"version": "1.1.1",
-					"resolved": "http://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
+					"resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
 					"integrity": "sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==",
 					"dev": true,
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@@ -3169,7 +3163,7 @@
 		},
 		"is-accessor-descriptor": {
 			"version": "0.1.6",
-			"resolved": "http://registry.npmjs.org/is-accessor-descriptor/-/is-accessor-descriptor-0.1.6.tgz",
+			"resolved": "https://registry.npmjs.org/is-accessor-descriptor/-/is-accessor-descriptor-0.1.6.tgz",
 			"integrity": "sha1-qeEss66Nh2cn7u84Q/igiXtcmNY=",
 			"dev": true,
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@@ -3235,7 +3229,7 @@
 		},
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 			"version": "0.1.4",
-			"resolved": "http://registry.npmjs.org/is-data-descriptor/-/is-data-descriptor-0.1.4.tgz",
+			"resolved": "https://registry.npmjs.org/is-data-descriptor/-/is-data-descriptor-0.1.4.tgz",
 			"integrity": "sha1-C17mSDiOLIYCgueT8YVv7D8wG1Y=",
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@@ -3553,7 +3547,7 @@
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 				"readable-stream": {
 					"version": "2.3.6",
-					"resolved": "http://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
+					"resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
 					"integrity": "sha512-tQtKA9WIAhBF3+VLAseyMqZeBjW0AHJoxOtYqSUZNJxauErmLbVm2FW1y+J/YA9dUrAC39ITejlZWhVIwawkKw==",
 					"dev": true,
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@@ -3568,7 +3562,7 @@
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 				"string_decoder": {
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-					"resolved": "http://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
+					"resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
 					"integrity": "sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==",
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@@ -4234,7 +4228,7 @@
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 				"readable-stream": {
 					"version": "2.3.6",
-					"resolved": "http://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
+					"resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
 					"integrity": "sha512-tQtKA9WIAhBF3+VLAseyMqZeBjW0AHJoxOtYqSUZNJxauErmLbVm2FW1y+J/YA9dUrAC39ITejlZWhVIwawkKw==",
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@@ -4249,7 +4243,7 @@
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 				"string_decoder": {
 					"version": "1.1.1",
-					"resolved": "http://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
+					"resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
 					"integrity": "sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==",
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@@ -4634,7 +4628,7 @@
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 				"readable-stream": {
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-					"resolved": "http://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
+					"resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
 					"integrity": "sha512-tQtKA9WIAhBF3+VLAseyMqZeBjW0AHJoxOtYqSUZNJxauErmLbVm2FW1y+J/YA9dUrAC39ITejlZWhVIwawkKw==",
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@@ -4649,7 +4643,7 @@
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 				"string_decoder": {
 					"version": "1.1.1",
-					"resolved": "http://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
+					"resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
 					"integrity": "sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==",
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@@ -5873,7 +5867,7 @@
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 				"readable-stream": {
 					"version": "2.3.6",
-					"resolved": "http://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
+					"resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
 					"integrity": "sha512-tQtKA9WIAhBF3+VLAseyMqZeBjW0AHJoxOtYqSUZNJxauErmLbVm2FW1y+J/YA9dUrAC39ITejlZWhVIwawkKw==",
 					"dev": true,
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@@ -5888,7 +5882,7 @@
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 					"version": "1.1.1",
-					"resolved": "http://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
+					"resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
 					"integrity": "sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==",
 					"dev": true,
 					"requires": {