diff --git a/deps/sources.jl b/deps/sources.jl
index 78ed497db..cfb7e91ca 100644
--- a/deps/sources.jl
+++ b/deps/sources.jl
@@ -27,7 +27,7 @@ import ZipFile
 const Maybe{T} = Union{T, Nothing}
 
 """
-Verify a list of `sources` located in `source_dir`. If AGF files are missing or invalid, try to download them using the
+Verify a list of `sources` located in `sourcedir`. If AGF files are missing or invalid, try to download them using the
 information provided in `sources`.
 
 Each `source ∈ sources` is a collection of strings in the format `name, sha256sum, url [, POST_data]`, where the last
@@ -36,18 +36,18 @@ sources (e.g. Sumita).
 
 Modifies `sources` in-place such that only verified sources remain.
 """
-function verify_sources!(sources::AbstractVector{<:AbstractVector{<:AbstractString}}, source_dir::AbstractString)
+function verify_sources!(sources::AbstractVector{<:AbstractVector{<:AbstractString}}, sourcedir::AbstractString)
     # track missing sources as we go and delete them afterwards to avoid modifying our iterator
     missing_sources = []
 
     for (i, source) in enumerate(sources)
         name, sha256sum = source[1:2]
-        source_file = joinpath(source_dir, "$(name).agf")
-        verified = verify_source(source_file, sha256sum)
+        sourcefile = joinpath(sourcedir, "$(name).agf")
+        verified = verify_source(sourcefile, sha256sum)
         if !verified && length(source) >= 3
             # try downloading and re-verifying the source if download information is provided (sources[3:end])
-            download_source(source_file, source[3:end]...)
-            verified = verify_source(source_file, sha256sum)
+            download_source(sourcefile, source[3:end]...)
+            verified = verify_source(sourcefile, sha256sum)
         end
         if !verified
             push!(missing_sources, i)
@@ -60,15 +60,15 @@ end
 """
 Verify a source file using SHA256, returning true if successful. Otherwise, remove the file and return false.
 """
-function verify_source(source_file::AbstractString, sha256sum::AbstractString)
-    if !isfile(source_file)
-        @info "[-] Missing file at $source_file"
-    elseif sha256sum == SHA.bytes2hex(SHA.sha256(read(source_file)))
-        @info "[✓] Verified file at $source_file"
+function verify_source(sourcefile::AbstractString, sha256sum::AbstractString)
+    if !isfile(sourcefile)
+        @info "[-] Missing file at $sourcefile"
+    elseif sha256sum == SHA.bytes2hex(SHA.sha256(read(sourcefile)))
+        @info "[✓] Verified file at $sourcefile"
         return true
     else
-        @info "[x] Removing unverified file at $source_file"
-        rm(source_file)
+        @info "[x] Removing unverified file at $sourcefile"
+        rm(sourcefile)
     end
     return false
 end
@@ -81,8 +81,15 @@ function download_source(sourcefile::AbstractString, url::AbstractString, POST_d
     try
         headers = ["Content-Type" => "application/x-www-form-urlencoded"]
         resp = isnothing(POST_data) ? HTTP.get(url) : HTTP.post(url, headers, POST_data)
-        reader = ZipFile.Reader(IOBuffer(resp.body))
-        write(sourcefile, read(reader.files[end]))  # todo detect .agf file(s)
+
+        # save agf file, unzipping if necessary
+        if endswith(url, ".agf")
+            agfdata = resp.body
+        else
+            reader = ZipFile.Reader(IOBuffer(resp.body))
+            agfdata = read(reader.files[findfirst(f -> endswith(lowercase(f.name), ".agf"), reader.files)])
+        end
+        write(sourcefile, agfdata)
     catch e
         @error e
     end
diff --git a/deps/sources.txt b/deps/sources.txt
index ce6614f69..78458139f 100644
--- a/deps/sources.txt
+++ b/deps/sources.txt
@@ -1,6 +1,6 @@
-NIKON a49714470fa875ad4fd8d11cbc0edbf1adfe877f42926d7612c1649dd9441e75 https://www.nikon.com/products/optical-glass/assets/pdf/nikon_zemax_data.zip
+NIKON a49714470fa875ad4fd8d11cbc0edbf1adfe877f42926d7612c1649dd9441e75 https://www.nikon.com/products/components/assets/pdf/nikon_zemax_data.zip
 OHARA 0c9021bf11b8d4e660012191818685ad3110d4f9490699cabdc89aae1fd26d2e https://www.oharacorp.com/xls/OHARA_201130_CATALOG.zip
-HOYA 9ca6b2bda157ba18333607f07a2af2458d7b097b86651ebb0743644b0ee96823 https://hoyaoptics.com/wp-content/uploads/2019/10/HOYA20170401.zip
+HOYA b02c203e5a5b7a8918cc786badf0a9db1fe2572372c1c163dc306b0a8a908854 http://www.hoya-opticalworld.com/common/agf/HOYA20210105.agf
 SCHOTT e9aabbb8ebff116ba0c106a71afd86e72f2a397ac9bc447469129e325e795f4e https://www.schott.com/d/advanced_optics/6959f9a4-0e4f-4ef2-a302-2347468a82f5/1.31/schott-optical-glass-overview-zemax-format.zip
-Sumita 6cbc566d451877e36aecd9e8be516962d8d120e70fba770c566811337aa4414d https://www.sumita-opt.co.jp/en/wp/wp-content/themes/sumita-opt-en/download-files.php files%5B%5D=zemax.agf&category=data
+Sumita c1093e42a1d08acbe30698aba730161e3b43f8f0d50533f65de8b6b11100fdc8 https://www.sumita-opt.co.jp/en/wp/wp-content/themes/sumita-opt-en/download-files.php files%5B%5D=new_sumita.agf&category=data
 NHG b3db4c677b1ac67cd9cce5be2abff88d13bcf24e4349dc789b2da12fdfe1a280